Category: Studies

3 to 5 Cups of Coffee Daily Extend Life and Reduce Disease Risk

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Dubai, 27 August 2025 (Qahwa World) – For centuries, coffee has been more than a drink. It has been a ritual, a social bond, a fuel for intellectual debate, and a daily companion for billions. Now, science is reaffirming that this centuries-old beverage is not only cultural but also profoundly tied to human health. A comprehensive review published this month in Nutrients concludes that moderate coffee consumption, typically three to five cups a day, is consistently linked to longer life and a reduced risk of many of the world’s leading causes of death.

The study, authored by Ryan Emadi and Dr. Farin Kamangar, examined decades of large-scale cohort research involving millions of participants across the United States, Europe, and Asia. Their findings show that people who regularly drink coffee enjoy between 10% and 15% lower overall mortality than non-drinkers. Importantly, both caffeinated and decaffeinated coffee were associated with these benefits, suggesting that the protective effects come not only from caffeine but also from the dozens of bioactive compounds present in coffee.

Evidence is particularly strong when it comes to major chronic diseases. For cardiovascular health, those who consumed three to five cups daily experienced about a 15% reduced risk of heart disease and stroke. Type 2 diabetes, a condition that affects hundreds of millions worldwide, also appears to be strongly influenced by coffee habits. A meta-analysis of more than one million participants found that coffee drinkers had nearly a 30% lower risk of developing type 2 diabetes, and this protection extended to both decaf and regular coffee. Among people already living with diabetes, coffee consumption was linked to fewer cardiovascular events and lower mortality rates.

The benefits extend to neurological health as well. Drinking coffee was associated with up to a 25% lower risk of cognitive disorders such as dementia and Alzheimer’s disease. The protective effect also applied to Parkinson’s disease, where coffee and caffeine intake not only lowered the risk of developing the disease but also slowed its progression among those already diagnosed. Respiratory diseases, another major global killer, also showed an inverse relationship with coffee consumption, while studies reported reduced risks of liver fibrosis, chronic kidney disease, and acute kidney injury among habitual drinkers.

Cancer, once the focus of skepticism about coffee, has now largely been cleared from suspicion. Earlier fears that coffee might contribute to cancer risk have been replaced by evidence suggesting the opposite. Coffee is now associated with reduced risk of several cancers, particularly of the liver, uterus, and endometrium. A pooled analysis of nineteen studies found that women who drank coffee had a 13% lower risk of endometrial cancer, and the relationship was dose-dependent—the more coffee, the lower the risk.

Beyond chronic disease, coffee also appears to play a role in everyday well-being and safety. Studies cited in the review showed that drivers consuming caffeinated coffee were significantly less likely to crash, and older adults had a reduced risk of falls. Researchers attribute this to coffee’s ability to improve alertness, attention, and mobility.

The mechanisms behind these benefits are diverse and interconnected. Coffee has been shown to improve glucose tolerance, enhance daily physical activity, increase fat oxidation during exercise, boost lung function, and reduce inflammation. One trial found that people who drank caffeinated coffee walked an average of 1,000 more steps per day than on days they abstained. Other studies demonstrated that coffee drinkers had lower levels of inflammatory markers, suggesting that coffee helps the body manage the underlying inflammation that fuels many chronic diseases.

Yet not all coffee is created equal. The review stressed that black coffee offers the strongest protection. Adding sugar, in particular, can cancel out or diminish benefits. Some studies have linked sugar-sweetened coffee to higher risks of depression and weight gain, while unsweetened coffee showed the opposite effect. Cream and milk appear less harmful, but excessive amounts of sugar and high-fat additives weaken coffee’s health profile.

There are also caveats. Pregnant women are advised to limit caffeine to below 200 milligrams per day, as higher intake may pose risks. Coffee can interfere with sleep if consumed too late in the day, cutting total sleep time by around 30 to 45 minutes. Excessive consumption may trigger anxiety, palpitations, or panic attacks in sensitive individuals. Despite these concerns, the authors emphasized that for the vast majority of adults, moderate consumption is not only safe but beneficial.

Dr. Farin Kamangar summarized the findings: “The results of several decades of high-quality research on millions of people show that coffee is overall beneficial to health. Moderate coffee consumption, typically three to five cups a day, is linked to increased longevity and reduced risks of many major diseases, including heart disease, stroke, type 2 diabetes, respiratory illnesses, and cognitive decline.”

This new consensus has already begun to reshape official guidelines. The U.S. Food and Drug Administration recently ruled that plain coffee with fewer than five calories per serving can be labeled as “healthy,” reflecting its favorable profile across multiple health outcomes.

In the end, coffee is not a cure-all, but the evidence is clear: consumed in moderation, it is far more friend than foe. For billions who reach for a cup each morning, the comfort of coffee now comes with scientific reassurance that it may also be extending their lives.

New Study Reveals the Secrets of Coffee Price Networks: What Do Quality and America Have to Do with It?

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Dubai – August 25, 2025 (Qahwa World) – A groundbreaking academic study titled Quality differences, location, and coffee price return networks: Insights from a high-dimensional CoVaR-copula analysis has shed light on the hidden mechanisms driving coffee price dynamics worldwide. The research highlights that both quality and geographic location play a central role in shaping risk spillovers and market interconnections across the global coffee trade.

The study analyzed daily data spanning twenty years and covering 17 distinct coffee varieties traded in three of the world’s most important markets: the United States, Germany, and France. The data, drawn from the International Coffee Organization (ICO), was not used in aggregated form. Instead, the researchers disaggregated it at the variety level, allowing for a far more detailed and accurate picture of price dynamics and market integration.

The findings suggest that high-quality coffees, such as mild arabicas, form stronger and more stable price linkages within markets, while lower-quality coffees like robusta exhibit more volatility and divergence. Moreover, risk spillovers are found to be stronger among coffees of similar quality, creating distinct clusters in the price network.

One of the study’s most important insights is the role of the United States as the central node of the global coffee risk network. As the world’s largest importer of coffee, the U.S. absorbs spillovers from European markets, particularly Germany and France. This centrality means that disturbances in European markets can quickly reverberate through the U.S., which then amplifies their impact across the rest of the world.

From a methodological standpoint, the study employed a high-dimensional CoVaR-copula framework, a sophisticated statistical approach that focuses on extreme price movements rather than long-term averages. Unlike traditional cointegration methods, which focus on whether prices move together in the long run, this approach looks at how shocks in one market are transmitted during stress periods to other markets.

To address the challenge of handling a large number of variables, the researchers used high-dimensional VAR (Vector Autoregressive) models combined with an Elastic-Net technique, which helps to reduce overfitting and manage what is known as the “curse of dimensionality.” This combination allowed for the creation of clearer, more precise connectedness networks, showing how risk flows between different coffee varieties and across national markets.

In addition to price data, the study incorporated insights from chemical analyses of coffee. Previous research had identified specific chemical compounds that differentiate varieties and contribute to flavor and aroma profiles. By aligning price data with chemical properties and trading locations, the researchers produced heatmaps and connectedness graphs that reveal how both intrinsic quality and geography drive the clustering of coffee markets.

The results demonstrate that geographical proximity facilitates faster transmission of information and market shocks, while chemical and sensory differences create visible separations within networks. In other words, the global coffee market is not just shaped by supply and demand—it is influenced by the interplay of quality, chemistry, taste, and trading location.

Although the study faced limitations, particularly the inability to analyze coffee futures contracts at the variety level due to insufficient data, it still provides valuable insights into the structure of the global coffee trade. By revealing how clusters form and risks spill over, the research helps explain why certain markets are more vulnerable than others during times of stress.

For policymakers, producers, and importers, these findings carry important implications. Monitoring general coffee price indices is no longer sufficient. Instead, stakeholders must consider differences in quality and geographic positioning when evaluating market risks. With global coffee markets under increasing pressure from climate change, supply chain disruptions, and regulatory frameworks such as the European Union’s deforestation regulation, this research offers a timely tool for risk management and strategic planning.

Ultimately, the study underscores how coffee—often seen as just a daily ritual—sits at the center of a complex economic web. Quality and geography act as the hidden levers of price dynamics, and the United States remains at the core of this network, both shaping and being shaped by the flows of risk. What emerges is a portrait of coffee not simply as a commodity, but as a global force whose market behavior reflects the broader challenges of interconnected economies.

Does a Cup of Coffee Weaken Your Treatment? Study Reveals a Surprise About Caffeine

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Dubai, 25 August 2025 (Qahwa World) – Coffee has long been celebrated as a daily ritual for millions, a comforting beverage that fuels mornings and punctuates workdays. Yet new scientific findings are shedding light on a potential downside that coffee drinkers might not expect: its ability to interfere with the effectiveness of certain antibiotics. According to a groundbreaking study recently published in the journal PLOS Biology, caffeine can alter how bacteria respond to some widely used antibiotics, raising concerns about the hidden influence of everyday dietary habits on medical treatments.

The study was conducted by an international team of researchers who set out to better understand how chemical substances affect the ability of bacteria to regulate what moves in and out of their cells. The focus was on Escherichia coli (E. coli), a bacterium commonly found in the human gut but also responsible for a range of infections from urinary tract infections to bloodstream infections. The scientists tested ninety-four different chemical substances and tracked their impact on bacterial transport systems, which function like cellular gates. Around a third of these substances were shown to disrupt genetic activity linked to transport, but one stood out more than any other: caffeine. When caffeine was introduced, E. coli absorbed noticeably lower amounts of certain antibiotics, most notably ciprofloxacin and amoxicillin, two drugs frequently prescribed around the world.

The mechanism behind this surprising effect turned out to be more complex than a simple blockage. At the center of the process was a regulatory protein called Rob, which the researchers discovered played a far larger role in bacterial survival than previously understood. Rob controlled about a third of all the transcriptional changes triggered by the different chemicals in the study. When caffeine entered the system, it activated Rob, which in turn stimulated the expression of a small RNA molecule known as MicF. This RNA molecule suppressed the production of OmpF, a porin protein in the outer membrane of E. coli. OmpF normally acts as an open gate, allowing substances, including antibiotics, to flow into the bacterial cell. By shutting down OmpF production, the bacteria effectively reduced the uptake of antibiotics, leaving the drugs less effective.

Researchers confirmed this effect through checkerboard assays, a method of testing drug interactions that involves exposing bacteria to different concentrations of antibiotics in the presence of caffeine. The results showed that the bacteria required higher doses of antibiotics to achieve the same level of inhibition once caffeine was present. This is a classic example of what scientists call low-level antibiotic resistance. It is not the dramatic, full-scale resistance that has become a global health crisis, where bacteria acquire mutations that allow them to permanently survive treatment. Instead, it is a subtler, temporary effect triggered by environmental changes and chemical exposures. These adaptations may not fully defeat antibiotics, but they can weaken their effectiveness and complicate treatment strategies.

Importantly, the weakening effect of caffeine was not observed in all bacteria. When the same experiments were carried out on Salmonella enterica, a pathogen closely related to E. coli, caffeine showed no influence on antibiotic absorption. This suggests that the response is species-specific and highlights how much remains unknown about the interaction between bacteria, antibiotics, and common dietary substances.

The authors of the study caution that these results were obtained under controlled laboratory conditions. At this stage, it is not possible to say how much coffee a person would need to drink to cause noticeable effects while taking antibiotics, or whether these findings translate directly to human patients. However, the researchers argue that the implications are serious enough to warrant further investigation. Even small shifts in antibiotic uptake could make infections harder to treat, particularly at a time when the medical community is racing to address the growing threat of antibiotic resistance worldwide.

Coffee has already been linked in past research to the way the body metabolizes certain medications, including drugs for high blood pressure and depression. The new findings extend this conversation to antibiotics, suggesting that caffeine’s influence reaches beyond human metabolism and into the bacterial world itself. As microbiologist Christoph Binsfeld of the University of Würzburg noted, substances like caffeine can “subtly but systematically” influence bacterial gene regulation, and mapping these mechanisms will be crucial for ensuring that antibiotics remain effective tools in modern medicine.

For coffee lovers, the message is not one of alarm but of awareness. More research will be needed to determine whether drinking coffee while on antibiotics has real-world clinical consequences. Until then, the study serves as a reminder that the foods and drinks we consume can interact with medical treatments in unexpected ways. With antibiotic resistance already recognized by the World Health Organization as one of the most pressing threats to global health, even small lifestyle factors deserve careful attention. The simple act of sipping coffee may seem harmless, but as this study reveals, it could be part of a much more complex story of how microbes adapt, survive, and challenge the medicines designed to fight them.

Shade-Grown Coffee Farms Store More Carbon Than Tree-Planting Projects, Study Finds

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Dubai, August 19, 2025 – (Qahwa World) – A landmark study has revealed that carbon markets are overlooking the most effective climate solution in coffee farming: protecting mature shade-grown coffee systems.

The research, led by the Smithsonian’s National Zoo and Conservation Biology Institute (NZCBI) and Smithsonian Tropical Research Institute (STRI), and published in Communications Earth & Environment, concludes that current carbon-payment schemes undervalue shade-grown farms. While farmers are rewarded for planting new trees, they receive no compensation for conserving existing shade trees, even though these trees store more than twice the carbon of new plantings.

Globally, coffee farms cover more than 10 million hectares. Systems range from intensive monocultures in full sun to agroforestry farms where coffee grows under canopies of diverse native trees. These shade trees regulate climate, provide habitat for wildlife, and store vast amounts of carbon. But under current carbon markets, only new tree-planting projects generate tradable credits. Farmers who maintain mature shade systems receive nothing, creating an incentive to cut old trees to plant new ones that qualify for payments.

“There is a lot of money behind planting trees on degraded coffee farms, yet there are basically no financial incentives—outside of Bird Friendly® certification—to protect standing shade trees,” said Dr. Ruth Bennett, ecologist at NZCBI and senior author of the study.

Shade Trees vs. Tree Planting

The team analyzed 67 field-based studies across Latin America, Africa and Asia, then modeled carbon storage across global coffee landscapes. They estimated that coffee farms currently store 481.6 million metric tons of carbon above ground.

Two contrasting scenarios were tested. If all sun-grown farms added shade trees, they would capture 82–87 million additional metric tons of carbon. But if existing shade-grown systems were converted into monocultures, the world could lose 174–221 million metric tons—more than double the potential gains from planting.

This imbalance exposes a fundamental flaw in current climate strategies. Shade-grown systems, which evolved over centuries, already represent vast stores of carbon. Removing them in pursuit of “new” tree-planting credits risks releasing far more carbon than could ever be recaptured.

Shade systems are also vital for biodiversity. Prior studies have shown that shade-grown coffee farms host up to four times more bird species than monocultures. Yet biodiversity outcomes don’t always align with carbon goals. Tree density improves carbon storage, while tree diversity supports wildlife. Carbon-focused projects often emphasize density, planting fast-growing monocultures that fail to deliver ecological benefits.

“If we don’t prioritize biodiversity in carbon projects, it won’t happen by accident,” said Dr. Emily Pappo, lead author and postdoctoral climate fellow at the Smithsonian. “Coffee companies must plant the right mix of trees—not just the most carbon-hungry species.”

Climate and Market Implications

Farmers are caught between climate pressures and market demands. Many remove shade trees in hopes of boosting yields, even though shade has been shown to stabilize production by regulating temperature and soil moisture. Meanwhile, large coffee companies invest heavily in tree-planting projects to meet corporate climate targets. Without incentives to conserve existing shade systems, these investments risk undermining their own objectives.

The economic stakes are significant. Coffee contributes an estimated $200 billion annually to the global economy. With the European Union’s Deforestation Regulation (EUDR) coming into force, companies face new requirements to prove that their supply chains are deforestation-free. Shade-grown systems that conserve habitat and store carbon could become critical to compliance as well as climate resilience.

The study’s authors argue for urgent policy change. They call for carbon markets to evolve by creating “protection credits” that reward conserving existing shade systems, not only planting new trees. They also recommend tree-planting initiatives that emphasize diversity rather than density, ensuring that biodiversity and carbon storage go hand in hand.

To support farmers, the Smithsonian team is developing a “Shade Catalog”, a resource to guide the selection of tree species that balance productivity, biodiversity, and carbon storage. Combined with certification schemes such as Bird Friendly®, these tools can help farmers access premium markets while conserving ecosystems.

Ultimately, the research reframes climate-smart coffee strategies. Planting trees remains a positive step, especially in degraded monoculture regions, but it cannot replace what is lost when mature shade systems are destroyed. Protecting existing forests delivers greater and more immediate benefits for both the planet and the coffee sector.

As Dr. Bennett concluded: “Tree planting has value, but our findings show it cannot make up for what you lose when mature shade trees are removed.”

Coffee Compounds Show Promise in Diabetes Management, Chinese Study Finds

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Beijing, August 19, 2025 (Qahwa World) – Coffee continues to surprise scientists not only as a beloved beverage but also as a source of powerful bioactive compounds. A new study by researchers at the Kunming Institute of Botany, Chinese Academy of Sciences, has uncovered six previously unknown molecules in roasted Coffea arabica beans with potential anti-diabetic properties.

The findings, published in Beverage Plant Research on February 18, 2025 (DOI: 10.48130/bpr-0024-0035), highlight how advanced screening methods can accelerate the search for functional food ingredients that may one day help in the management of type 2 diabetes.

Coffee and Functional Foods

Functional foods are increasingly valued for delivering compounds with health benefits beyond basic nutrition—such as antioxidant, neuroprotective, or glucose-lowering effects. Identifying such compounds, however, has long been a challenge. Conventional extraction and testing methods are often slow, inefficient, and require large amounts of solvents.

To overcome these hurdles, scientists are turning to nuclear magnetic resonance (NMR) and liquid chromatography–mass spectrometry (LC-MS/MS). These tools allow researchers to scan complex food systems like roasted coffee and pinpoint molecules with potential biological activity.

A Three-Step Discovery Approach

Led by Professor Minghua Qiu, the research team developed a streamlined, activity-guided method to identify compounds that inhibit α-glucosidase, an enzyme central to carbohydrate digestion and a validated target for diabetes therapies.

  1. Fractionation and Screening – The diterpene extract of roasted Arabica beans was separated into 19 fractions. Using ^1H NMR spectroscopy combined with α-glucosidase activity assays, the team identified fractions 9–13 as the most bioactive.

  2. Structural Clues – A deeper analysis of fraction 9 with ^13C-DEPT NMR revealed a distinctive aldehyde signal. Guided by this, the researchers used semi-preparative HPLC to isolate three new compounds.

  3. Isolation of New Molecules – The compounds, named caffaldehydes A, B, and C, were confirmed using 1D and 2D NMR and high-resolution mass spectrometry (HRESIMS). Each carried a different fatty acid side chain: palmitic, stearic, or arachidic.

To explore trace compounds that might escape traditional detection, the team also applied LC-MS/MS molecular networking via the Global Natural Products Social Molecular Networking (GNPS) platform. This revealed three additional diterpene esters, bringing the total to six novel molecules.

Potent Activity in Lab Tests

When tested against α-glucosidase, the three purified caffaldehydes showed promising activity:

  • Caffaldehyde A (palmitic) – IC₅₀ = 45.07 μM

  • Caffaldehyde B (stearic) – IC₅₀ = 24.40 μM

  • Caffaldehyde C (arachidic) – IC₅₀ = 17.50 μM

For comparison, the control drug acarbose, widely prescribed for type 2 diabetes, had an IC₅₀ of 607.1 μM under the same assay conditions. This suggests the new compounds were markedly more potent in this laboratory model.

However, scientists caution that these assays used yeast-derived enzymes, where acarbose is known to appear weaker. Against human intestinal α-glucosidase, acarbose is far more effective, meaning the real-world therapeutic potential of the caffaldehydes remains to be tested.

Implications for Coffee and Health

The discovery expands scientific understanding of coffee’s functional components. Alongside well-known diterpenes like cafestol and kahweol, these new caffaldehydes show how coffee beans still hold untapped chemical diversity.

While the compounds were found in roasted Arabica beans, the study did not measure their concentrations in brewed coffee or assess how much consumers might actually ingest. Nor were any animal or human trials conducted, meaning it is too early to suggest direct health benefits from drinking coffee.

Nevertheless, the work provides an innovative fast-track strategy for identifying biologically relevant compounds in foods. By integrating NMR, MS-based molecular networking, and bioassays, the method reduces solvent use and time compared to traditional isolation techniques.

The Road Ahead

The authors emphasize that further research is essential. Upcoming studies will focus on:

  • Testing the new compounds in cellular and animal models of diabetes.

  • Measuring their bioavailability and safety in living systems.

  • Exploring whether these molecules are present in significant amounts in brewed coffee.

If validated, the compounds could inspire new nutraceuticals or functional food ingredients targeting glucose regulation.

Balanced Perspective

Coffee’s health effects remain a double-edged sword. While compounds like cafestol have shown potential benefits for blood sugar control, they are also linked to increased LDL cholesterol, particularly in unfiltered brewing methods. Any future application of coffee-derived diterpenes as functional ingredients will need to carefully weigh glycemic benefits against possible cardiovascular risks.

Conclusion:


This groundbreaking study demonstrates how modern analytical tools can unlock coffee’s hidden bioactive chemistry. Although it is too soon to claim clinical benefits, the discovery of six new diterpene esters—three of which strongly inhibit a key enzyme in carbohydrate metabolism—marks an important step in coffee research. For now, the findings highlight coffee’s role not only as a cultural and economic powerhouse but also as a promising reservoir for future health innovations.

Source: Beverage Plant Research, Chinese Academy of Sciences (DOI: 10.48130/bpr-0024-0035)

German–UK Study Finds Morning Coffee Boosts Positive Mood and Relieves Withdrawal Symptoms

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Dubai – Qahwa World

A new scientific study published in Scientific Reports has revealed that the morning cup of coffee does more than increase alertness: it significantly enhances positive mood, making people feel happier and more enthusiastic in the early hours of the day.

Conducted by researchers from Bielefeld University in Germany and the University of Warwick in the United Kingdom, the study provides strong evidence that caffeine is closely linked to improved well-being, particularly in the morning.

The research tracked 236 adult participants across two separate studies.

  • The first study involved 115 participants over 14 days, resulting in 8,335 individual mood assessments.

  • The second study involved 121 participants over 28 days, generating nearly 19,960 assessments.

Using the Experience Sampling Method (ESM), participants were asked to record their mood seven times a day on their smartphones. They also noted whether they had consumed a caffeinated drink in the previous 90 minutes.

Key Findings

  • Caffeine consumption was strongly associated with higher positive mood (happiness, enthusiasm, and energy), especially during the first 2.5 hours after waking up.

  • The impact on negative mood (feelings such as sadness, anger, or irritation) was minimal and less consistent.

  • Results were consistent across different levels of caffeine intake and were not significantly affected by whether participants reported sleep disturbances, anxiety, or other psychological conditions.

  • Researchers suggested that the morning effect could partly be due to reversal of mild overnight caffeine withdrawal symptoms, as even moderate consumers may wake up experiencing them.

Scientific Explanation

Caffeine improves mood through two main mechanisms:

  1. Blocking adenosine receptors in the brain, reducing drowsiness and boosting alertness.

  2. Stimulating dopamine production, a neurotransmitter known as the “happiness hormone,” which is linked to motivation and reward.

Professor Anu Realo, a co-author of the study, explained:

“Even moderate caffeine consumers may experience mild withdrawal symptoms that disappear with the first cup of coffee in the morning.”

Lead researcher Jostin Hachenberger added that caffeine’s mood-enhancing effect was largely independent of social or psychological factors but could be influenced by physical conditions, such as fatigue.

Critical Notes

  • Since most participants were habitual caffeine consumers, the study could not determine how coffee might affect people who completely avoid caffeine.

  • The findings do not support the claim that caffeine worsens anxiety; rather, the researchers noted that those who are sensitive to caffeine’s negative effects usually self-select out by avoiding it.

Global Context

  • Approximately 80% of adults worldwide consume coffee or tea daily, highlighting the global significance of these findings.

  • Interestingly, caffeine’s appeal is not limited to humans: previous studies have shown that bees and wasps are attracted to nectar containing caffeine, underlining its powerful influence in nature.

Conclusion

The study concludes that the morning cup of coffee is more than just a daily ritual. It has a scientifically measurable impact on enhancing positive mood and boosting emotional well-being, particularly in the hours after waking. While it may not significantly reduce negative emotions such as sadness or anger, its role in fostering happiness, enthusiasm, and energy makes coffee one of the most influential beverages in modern life.

US Report: Caffeinated Coffee Is Generally Safe Despite Some Risks

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Dubai, 18 August 2025 (Qahwa World) – A new investigation by the US-based nonprofit Clean Label Project has revealed that caffeinated coffee is largely safe from harmful toxins and contaminants, though certain risks remain present in some products.

The Clean Label Project, an independent consumer advocacy organization, specializes in testing food and beverage products for hidden contaminants such as heavy metals, pesticides, and plasticizers. The group’s latest study examined 45 popular coffee brands from Brazil, Colombia, Costa Rica, Ethiopia, Guatemala, Kenya, Peru, and Hawaii, conducting more than 7,000 laboratory tests.

Safe Overall, but Not Entirely Risk-Free

“While some contaminants were present, most were found at minimal levels and well below the European Union’s safety limits per 6-ounce serving. This means coffee is generally safe,” said Molly Hamilton, executive director of the Clean Label Project.

The study found:

  • Glyphosate and AMPA (byproduct): While glyphosate, a widely used herbicide, was detected only in trace amounts, its byproduct AMPA was more common, including in 100% of the organic samples tested.

  • Phthalates: Small amounts of these plasticizers, linked to reproductive and hormonal issues, were detected at higher levels in canned and pod coffee than in bagged coffee.

  • Heavy Metals: Levels varied by origin, with the lowest in African coffees and the highest in Hawaiian samples, consistent with volcanic soil content.

  • Acrylamide: Found in all samples, this chemical forms during roasting. Medium roasts contained the highest concentrations, while light and dark roasts showed lower levels.

Industry and Expert Response

David Andrews, acting chief science officer of the Environmental Working Group, said the results show packaging may be a key source of contamination. “The higher phthalate levels found in coffee pods and canned coffee suggest that packaging could be a meaningful source of these chemicals of concern,” he explained.

The National Coffee Association (NCA), which represents the US coffee industry, rejected concerns raised by the report.
“It is highly irresponsible to mislead Americans about the safety of their favorite beverage,” said William “Bill” Murray, NCA president and CEO. “Decades of independent scientific evidence show that coffee drinkers live longer, healthier lives.”

Organic Coffee Findings

Although organic coffees generally contained fewer contaminants than conventionally grown samples, all 12 organic coffees tested contained AMPA. According to Hamilton, this could result from environmental contamination via water or neighboring farms using pesticides.

“Still, the detection of AMPA in 100% of organic samples is a wake-up call,” Hamilton said. “We need stronger safeguards and greater transparency in our food system.”

What Consumers Should Do

The Clean Label Project stressed that coffee remains one of the cleanest products they have ever tested. However, Hamilton recommended practical steps for consumers:

  • Choose dark or light roasts to reduce acrylamide intake.

  • Prefer bagged coffee over cans or pods to lower phthalate exposure.

  • Consider origin, as soil conditions influence heavy metal content.

“Our report isn’t meant to raise alarm or discourage coffee drinking,” Hamilton concluded. “It’s about empowering people to choose the cleanest and safest cup of coffee possible.”

Coffee May Help You Live Longer—But Only If You Drink It This Way

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Dubai, 17 August 2025 (Qahwa World) – Coffee has long been at the center of debate: is it good for your health or not? A new study from Tufts University, published in The Journal of Nutrition, adds weight to the argument that coffee can indeed be beneficial—so long as you drink it the right way.

Researchers analyzed data from 46,332 American adults collected between 1999 and 2018. They discovered that drinking coffee daily is linked to a significant reduction in mortality risk:

  • One cup per day was associated with a 16% lower risk of death from all causes, including cardiovascular disease.

  • Two to three cups daily provided slightly more benefit, with a 17% lower mortality risk.

  • Drinking more than three cups a day, however, did not add further benefits.

While the study highlights the health benefits of coffee, it also emphasizes a major caveat: the way you drink it matters. The protective effects were most evident in those who consumed black coffee or coffee with minimal sugar.

Those who regularly added cream and sugar had similar mortality rates to non-coffee drinkers. Essentially, the more sugar and saturated fat added, the weaker the health benefits.

“Coffee is among the most-consumed beverages in the world, and with nearly half of American adults reporting drinking at least one cup per day, it’s important for us to know what it might mean for health,” said Fang Fang Zhang, senior author of the study and professor at Tufts University.

She explained that the benefits are likely tied to coffee’s bioactive compounds, including antioxidants, which can promote cardiovascular health and reduce inflammation. But the positive effects can be offset when sugar and cream are added in large amounts.

This new study builds on earlier findings that link coffee to better health outcomes. In 2025 alone:

  • A study published earlier this year found morning coffee drinkers had lower rates of premature death.

  • Another study in June reported that coffee supports healthy aging, particularly among women.

Together, these findings suggest that plain coffee—without excessive add-ins—may contribute to longevity and overall well-being.

While coffee trends like collagen creamers, sweetened flavor boosters, and “superfood” additives continue to rise in popularity, the evidence points back to simplicity.

As Zhang summarized: “The health benefits of coffee might be attributable to its bioactive compounds, but our results suggest that the addition of sugar and saturated fat may reduce the mortality benefits.”

So, if you want to raise your mug to better health and a longer life, skip the extra sugar and cream. Black coffee may just be the way to go.

Barista Terminology | Episode 13: Espresso Machine Components Explained

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Understanding an espresso machine’s anatomy is essential for any barista. Whether you’re pulling shots, steaming milk, or troubleshooting a problem, knowing how each part functions ensures better coffee and safer operation.

  1. Group Head
  • The component where the portafilter locks in and water is dispersed over the coffee puck.
  • It includes a screen and gasket and is usually made of brass or stainless steel to retain heat.
  • Consistent temperature here ensures consistent extraction.
  1. Portafilter
  • A handle with a filter basket that holds ground coffee.
  • Comes in spouted, bottomless (naked), and pressurized variants.
  • Must be evenly filled and tamped for optimal extraction.
  1. Filter Basket
  • The metal insert inside the portafilter that holds the coffee grounds.
  • Sizes vary (single, double, triple), and hole precision affects flow rate.
  • Needs to be cleaned regularly to avoid flavor contamination.
  1. Boiler
  • The machine’s internal tank that heats and stores water for brewing or steaming.
  • Single boiler, dual boiler, and heat exchanger types exist.
  • Pressure and temperature stability here are key for quality shots and milk texturing.
  1. Pump
  • Responsible for delivering water to the group head at high pressure (~9 bars).
  • Most machines use rotary or vibratory pumps.
  • A stable pump ensures consistent flow and extraction.
  1. Steam Wand
  • The nozzle used to froth or steam milk.
  • Has one or multiple holes (tips) that control steam pressure and direction.
  • Must be cleaned immediately after each use to prevent milk buildup.
  1. Pressure Gauge
  • Displays boiler and/or pump pressure.
  • Useful for diagnosing performance issues.
  • Helps baristas track consistency during extraction.
  1. Drip Tray
  • Collects waste water and spilled coffee.
  • Should be emptied and rinsed regularly to maintain hygiene.
  • May include a drain pipe in plumbed-in machines.
  1. Hot Water Tap
  • Provides hot water for Americanos or tea.
  • Connected to the boiler system.
  • Useful but can introduce temperature instability if overused.
  1. Control Panel / Buttons
  • Manual machines use switches or levers.
  • Semi-automatics and automatics use programmable buttons for shot volume and other functions.
  • Some modern machines include touchscreens and PID temperature controls.

Related Stories:

Barista Terminology | Episode 12: Brewing Equipment Maintenance & Hygiene

Barista Terminology | Episode 11: Milk-Based Coffee Drinks

Barista Terminology | Episode 10: Advanced Concepts

Barista Terminology | Episode 9: Sensory Evaluation

Barista Terminology | Episode 8: Customer Service Language in the Café

Barista Terminology | Episode 7: Water & Temperature Control

Barista Terminology | Episode 6: Grind & Extraction Variables

Barista Terminology | Episode 5: Milk Texturing & Latte Art

Barista Terminology | Episode 4: Brew Methods Explained

Barista Terminology | Episode 1: The Coffee Bean – From Seed to Roast

Barista Terminology | Episode 2: Barista Tools & Equipment

Barista Terminology | Episode 3: Espresso Basics

 

Anaerobic Fermentation Transforms Unripe Coffee Cherries into Specialty-Grade

Posted on by Qahwa World

Dubai,August 15, 2025 – (Qahwa World) – Unripe coffee cherries, long discarded for their harsh and astringent taste, may now hold hidden value thanks to a breakthrough study from Brazil. Researchers at the Federal University of Uberlândia (UFU) have demonstrated that self-induced anaerobic fermentation (SIAF) can transform immature beans from the Arara cultivar into beverages scoring above 80 points on the Specialty Coffee Association (SCA) scale—the threshold for specialty coffee.

Rethinking the Role of Unripe Cherries

In the specialty coffee sector, greenish unripe beans are typically excluded for producing bitter, pungent flavors. The UFU team challenged this assumption by fermenting unripe Arara cherries in 200-liter hermetically sealed bioreactors for up to 96 hours, with variations in temperature, pH control, water content, and yeast inoculation.

Blind cupping by professional Q-graders revealed that fermented lots containing 13% to 30% unripe cherries not only matched but in some cases outperformed beverages produced solely from ripe cherries. When temperature was carefully controlled at 27 °C, the results were particularly striking, with tasters awarding higher scores than those given to control samples of ripe fruit processed without anaerobic fermentation.

How It Works

The SIAF process places cherries in sealed tanks without oxygen. Naturally occurring microorganisms in the fruit initiate biochemical reactions, releasing carbon dioxide and altering the beans’ chemical profile. These changes reduce the undesirable qualities of immature beans and create new flavor attributes.

The research team also developed a monitoring device to track temperature and pH inside the bioreactors in real time, ensuring precision without disturbing the fermentation process.

Wider Impact for Coffee Growers

The implications are significant. Roughly 70% of the cherries harvested in the UFU trials were unripe, identified using an AI tool created by the research group. Traditionally considered a loss, these cherries now represent a potential source of added value for farmers, particularly in regions where inconsistent ripening reduces yields of high-quality beans.

“Using SIAF with temperature and pH control can minimize the negative effects of immature beans and even elevate the beverage, adding value while still on the farm,” explains Luiza Braga, lead author of the study and a master’s researcher at UFU’s Faculty of Chemical Engineering.

A Collaborative Effort

The project, titled Transforming Challenges into Quality: The Power of Controlled Fermentation in Immature Arara Coffee Beans, was published in Food and Bioprocess Technology. It was supported by FAPESP in partnership with Brazil’s Ministry of Science, Technology, and Innovation (MCTI), with additional funding from FAPEMIG, CAPES, CNPq, and FINEP.

The study forms part of the “Da Semente à Xícara” (Seed to Cup) research group, established in 2019 to advance post-harvest coffee innovations.

What’s Next?

The researchers aim to identify the specific compounds in fermented unripe coffee responsible for the positive sensory attributes and to test the technique on other Arabica varieties.

If successful, anaerobic fermentation could become a vital tool for producers navigating volatile markets, offering a way to extract more value from every harvest. In a world where coffee demand is rising and prices fluctuate, turning waste into quality may be one of the most promising innovations yet.

Online Sensory Training Reshapes Coffee Tasting Skills

Posted on by Qahwa World

2023 study reveals a 15% improvement in aroma recognition among coffee professionals in just six weeks

A landmark 2023 peer-reviewed study by the University of Copenhagen, in collaboration with CoffeeMind Academy, has demonstrated that an innovative online training program—combining sensory exercises, cognitive tasks, and gamification—can significantly enhance the aroma recognition skills of coffee professionals.

Published in the Journal of Sensory Studies and led by researcher Ida Steen, the study involved 44 coffee professionals aged 22–52 in a 12-week crossover trial. The program consisted of six weeks of intensive online training using the Le Nez du Café aroma set—standard in SCA and CQI certifications—paired with memory games, focus exercises, and mindfulness breathing, followed by a six-week control period with simple weekly sensory activities.

Key Findings

  • 15% average improvement in aroma recognition.

  • Over 30% improvement in detecting coffee pulp, toast, roasted peanuts, green peas, clove, cooked beef, straw, and pepper.

  • Persistent difficulty with aromas like rubber, roasted coffee, medicinal, and blackcurrant.

  • Skills retained after the training period ended.

Industry Implications

The detailed aroma-by-aroma mapping challenges existing certification kits, showing some aromas are too easy (like lemon) or too difficult (like medicinal) to be reliable indicators of sensory skill. These findings may prompt organizations like SCA and CQI to review their training and exam materials.

The Cognitive Edge

The program leveraged neuroplasticity—the brain’s ability to form new neural pathways through practice—by combining aroma recognition with cognitive training to strengthen working memory, focus, and decision-making during evaluations. Participants who completed all six daily tasks achieved the greatest improvements, underscoring the value of structured, disciplined training.

Beyond Coffee

This model can be applied to wine, chocolate, and other sensory fields, and even adapted for smell rehabilitation programs, such as for post-COVID patients.

Conclusion

By proving that online, gamified, and cognitive-enhanced training can deliver measurable, lasting improvements, the study offers a scalable and engaging alternative to traditional, in-person sensory training—reshaping professional coffee education worldwide.

Iron-Fortified Coffee Breakthroughs Aim to Tackle Global Malnutrition Without Changing Taste

Posted on by Qahwa World

Dubai, 14 August 2025 (Qahwa World) – Two major research efforts on opposite sides of the globe are redefining how iron — one of the most essential yet deficient nutrients worldwide — can be seamlessly integrated into coffee and other foods without altering their taste or quality.

A Global Health Problem

Around 2 billion people suffer from iron deficiency, which can lead to anemia, impaired brain development in children, reduced immunity, chronic fatigue, and higher infant mortality rates. Traditional food fortification programs have been successful but face persistent challenges: iron often reacts with food components, causing metallic flavors, reduced bioavailability, and degradation during storage or cooking.

MIT’s Breakthrough: Iron and Iodine in a Single Microparticle

Researchers at the Massachusetts Institute of Technology (MIT) have developed metal–organic framework (MOF) microparticles — tiny crystalline cages made from iron and a food-safe ligand (fumaric acid) — capable of delivering iron without unwanted chemical interactions.

  • Particle size: 10–100 µm, small enough to disperse invisibly in food or drink without affecting texture.

  • Key innovation: MOFs prevent iron from reacting with polyphenols in coffee and tea — compounds that typically reduce iron absorption.

  • Dual fortification: The same particles, branded “NuMOFs,” can also carry iodine without either nutrient degrading, enabling “double-fortified” foods.

  • Adaptability: Platform can potentially deliver other nutrients like zinc, calcium, magnesium, or vitamin A.

Ana Jaklenec, principal investigator at MIT’s Koch Institute, said:

“We wanted a fortification approach that could be used globally without having to reformulate for each country’s staple foods — whether that’s bread, rice, coffee, or tea.”

The MOFs remain stable under long-term storage, high heat and humidity, and even boiling. They only release their payload when exposed to stomach acidity, ensuring maximum bioavailability.

In animal trials, both iron and iodine were detected in the bloodstream within hours of consumption, with radioactive iodine later localizing in the thyroid and clearing via the kidneys.

The research, led by postdoc Xin Yang and Dr. Linzixuan (Rhoda) Zhang, was published in Matter and partially funded by the J-WAFS Fellowships for Water and Food Solutions, with ongoing development supported by the Bill & Melinda Gates Foundation.

Indian Study Identifies Optimal Iron Compounds for Coffee

Meanwhile, in India, a team from the CSIR-Central Food Technological Research Institute (CSIR-CFTRI) in Mysuru systematically evaluated seven different iron compounds for fortifying Arabica coffee:

  • Ferric sodium EDTA (FSE) – Highest solubility (>90%), iron retention of 4.702 mg/100 mL brewed coffee, minimal interaction with coffee polyphenols, negligible flavor change.

  • Ferrous bisglycinate (FB) – Good solubility and sensory profile.

  • Ferrous sulfate (FS) and Ferrous gluconate (FG) – Acceptable results but lower iron retention.

  • Ferrous fumarate (FF) and Electrolytic iron (EI) – Stability issues and undesirable metallic or astringent flavors.

  • Ferric pyrophosphate (FPP) – Poor solubility and limited absorption potential.

Sensory testing confirmed that FSE-fortified coffee maintained desirable aroma, flavor, and mouthfeel, while chemical analyses (ATR-FTIR and GC–MS) showed minimal impact on key volatile compounds.

Lead author B.S. Yashwanth emphasized the public health potential:

“Coffee is one of the most widely consumed beverages globally. Choosing the right iron fortificant can turn it into a functional food that addresses micronutrient deficiencies without sacrificing consumer enjoyment.”

Commercial and Scientific Outlook

  • Color challenge: MOFs currently appear brown, and researchers are working to adapt the color for integration into light-colored foods like salt.

  • Cost control: For applications like double-fortified salt, the added cost must remain low to be viable in developing countries (e.g., salt sells for just $0.20–$1/kg).

  • Industry readiness: MIT’s team is launching a spin-off company to develop iron- and iodine-fortified coffee, tea, and other beverages, while the Indian research offers an immediate pathway for large-scale adoption of iron fortification in coffee production.

Experts suggest the combined insights from these two studies could pave the way for region-specific fortification strategies — using MOF-based delivery where dual micronutrient stability is key, and using optimized compounds like FSE for direct coffee fortification where production and consumer acceptance are priorities.

Bottom line: With billions still affected by iron deficiency, these innovations signal a new era where your morning coffee could do more than wake you up — it could help close one of the most persistent nutrition gaps in the world.