AHA Says Five Cups of Coffee Daily Safe for Adults

Posted on July 20, 2026 by Qahwa World

Source: Qahwa World
Author: Qahwa World
Date: July 20, 2026

AHA Says Five Cups of Coffee Daily Safe for Adults

American Heart Association statement says up to five cups of coffee daily is safe for most adults.
Three to five 8-ounce cups (about 400 mg caffeine) linked to lower risk of heart disease and stroke.
The statement published in Circulation journal analyzed dozens of studies on coffee and heart health.
Coffee may help heart health through increased exercise, diuretic effects, and reduced inflammation.
Some decaf coffee studies also show benefits due to polyphenols acting as antioxidants.
Energy drinks contain higher caffeine levels and may pose health risks, researchers warn.
Sugar, syrups, and saturated-fat creamers can dilute or eliminate coffee’s benefits.

There is good news for coffee drinkers. Up to five cups of coffee daily are safe for most adults. The brew may even have benefits for heart health. This comes from a new scientific statement by the American Heart Association.

Drinking three to five 8-ounce cups daily is linked to lower health risks. These include heart disease, heart failure, stroke, and Type 2 diabetes. The statement was published Monday in the journal Circulation.

Mixed Research Gets Much-Needed Clarity

Research on coffee and caffeine has been very mixed. Some studies show benefits. Others show health risks. The new statement provides much-needed clarity.

Dr. Eugenia Gianos is a cardiologist at Northwell Health in New York. She was not involved in the statement. She noted that the public is confused. Many clinicians also do not know how to guide their patients. She added that it is great that coffee might even have benefits. “We could even be recommending soon that people have coffee,” she said.

What the Study Found

The statement’s authors analyzed dozens of studies. They looked at the impact of coffee and caffeine on heart health. Researchers came from the Harvard T.H. Chan School of Public Health. George Washington University and other institutions also participated.

Dr. Gregory M. Marcus is the statement’s lead author. He is a cardiologist at UC San Francisco. He said evidence for coffee’s safety and benefits has been building over time. Most studies are observational. They cannot prove cause and effect. However, there have been more randomized controlled trials in recent years. These show that coffee consumption can be beneficial for heart health.

**Key Findings from AHA Coffee Statement**
Finding	Detail
Safe daily intake	Up to five 8-ounce cups (approx. 400 mg caffeine)
Health benefits linked	Lower risk of heart disease, stroke, heart failure, Type 2 diabetes
Optimal range	Two to four cups daily
Decaf benefits	Also linked to lower diabetes and heart disease risk
Warning	Sugar, syrups, creamers dilute benefits
Energy drinks	Higher caffeine, potential health risks

Why Coffee Might Help the Heart

Scientists are still studying why caffeine might help the heart. People tend to exercise more on days they drink caffeinated coffee. Coffee acts as a diuretic and can lower blood pressure. Caffeine also blocks a substance that causes atrial fibrillation. This arrhythmia can lead to strokes.

Coffee contains other beneficial substances. These include polyphenols that act as antioxidants. They may reduce inflammation. This could explain why decaf coffee is also linked to lower risks of Type 2 diabetes and heart disease in some studies.

The Sweet Spot for Coffee Consumption

Research suggests the sweet spot for caffeinated coffee is two to four cups daily. This amount is enough to have a biological effect. It is not so much that it reaches toxic levels.

People have different responses to caffeine. Genetics and consumption habits play a role. “We all metabolize caffeine at different speeds,” Marcus said.

What to Avoid

The benefits of coffee can be diluted or eliminated by additives. Sugar, syrups, and creamers with saturated fat are problematic. The statement advises caution with these additions.

The AHA statement also examined other caffeine sources. Energy drinks often contain much higher caffeine levels than coffee. Some research has found they can lead to health problems. These include irregular heartbeats and high blood pressure. Marcus advises people to avoid energy drinks.

“Not only is the lay public confused about this topic, but many clinicians out there don’t know how to guide their patients. It is great that a drink so many people enjoy daily might even have benefits. We could even be recommending soon that people have coffee.”

— Dr. Eugenia Gianos, Northwell Health

“We all metabolize caffeine at different speeds.”

— Dr. Gregory M. Marcus, UC San Francisco

Implications for Public Health

The AHA statement offers clear guidance for consumers and clinicians. It suggests that moderate coffee consumption can be part of a heart-healthy lifestyle. The evidence supports coffee’s safety and potential benefits. However, individual responses vary. People should be mindful of additions like sugar and cream. Energy drinks should be avoided due to higher risks.

Frequently Asked Questions

Is it safe to drink five cups of coffee daily?Yes, according to the American Heart Association. Up to five 8-ounce cups daily (about 400 mg caffeine) are safe for most adults.

What are the health benefits of coffee?Moderate coffee consumption is linked to lower risk of heart disease, heart failure, stroke, and Type 2 diabetes.

What is the optimal number of cups per day?Research suggests the sweet spot is generally between two and four cups daily for cardiovascular benefits.

Is decaf coffee also beneficial?Yes, some studies show decaf coffee is also linked to lower risk of Type 2 diabetes and heart disease due to polyphenols.

Can additives reduce coffee’s benefits?Yes, sugar, syrups, and creamers with saturated fat can dilute or eliminate the health benefits of coffee.

Are energy drinks safe?Researchers advise avoiding energy drinks. They often contain much higher caffeine levels and have been linked to irregular heartbeats and high blood pressure.

Scientists from the Technical University of Munich Uncover the Secret of Coffee’s Mild Bitterness

Posted on June 9, 2026 by Qahwa World

Source: Technical University of Munich – Journal of Agricultural and Food Chemistry |
Author: Qahwa World |
Date: June 9, 2026

Scientists from the Technical University of Munich Uncover the Secret of Coffee’s Mild Bitterness

Key Findings:

Pure caffeine is intensely bitter – often described as harsh, medicinal, and almost undrinkable. Yet coffee does not taste nearly that bitter.
Researchers from the Technical University of Munich discovered that compounds formed during roasting reduce perceived bitterness by up to 50%.
The key compounds are melanoidins, which are created during the Maillard reaction when coffee beans are roasted.
In real coffee brews, panelists barely noticed caffeine’s bitterness even when its concentration was increased tenfold.
Melanoidins bind with caffeine, forming molecular complexes that prevent caffeine from reaching bitter taste receptors on the tongue.
Darker roasts produce more melanoidins, potentially offering stronger bitterness masking effects.
The findings open new possibilities for improving instant and ready-to-drink coffees, as well as developing low-bitterness blends.

For centuries, coffee lovers have enjoyed their daily brew without realizing they were experiencing a remarkable chemical deception. Pure caffeine is intensely bitter – often described as harsh, medicinal, and almost undrinkable. Its concentration in a typical cup of coffee far exceeds the level the human tongue can normally detect. Yet coffee does not taste nearly as bitter as it should.

Now, a new study from the Technical University of Munich (TUM) and the Leibniz-Institute for Food Systems Biology has finally solved this long-standing puzzle. Published in the Journal of Agricultural and Food Chemistry, the research reveals that compounds formed during roasting play a starring role in masking caffeine’s harsh edge.

The Experiment That Cracked the Code

Led by researchers Michael Gigl, Johanna Kreissl, and Oliver Frank, the team used a trained sensory panel – experts skilled in precise taste evaluation – to systematically test how different coffee components interact with caffeine. The results were striking. When caffeine was dissolved in water at normal coffee concentrations, panelists rated its bitterness as intensely unpleasant. But when the same amount of caffeine was combined with key coffee compounds – particularly chlorogenic acids and melanoidins – the perceived bitterness dropped by approximately 50%. In real coffee brews, the masking effect was even stronger. Panelists barely noticed caffeine’s signature bitterness even when its concentration was increased up to ten times higher than usual.

Melanoidins Take Center Stage

Using advanced nuclear magnetic resonance (NMR) spectroscopy, the scientists confirmed that caffeine forms complexes with melanoidins – the high-molecular-weight polymers produced through the Maillard reaction during roasting. These complexes appear to reduce the amount of “free” caffeine available to bind to bitter taste receptors on the tongue. The larger molecular structures may also create physical barriers or steric hindrance, limiting access to those receptors.

“Chlorogenic acid alone had little effect,” the researchers noted, “but when combined with melanoidins at natural concentrations found in coffee, the bitter intensity was strongly reduced.” Melanoidins not only suppress bitterness but also help transform the quality of the remaining bitterness into something more pleasant and “coffee-like,” rather than medicinal or harsh.

Compound	Source	Effect on Bitterness
Caffeine	Green beans	Extremely harsh bitterness
Chlorogenic acids	Green beans	Little effect alone
Melanoidins	Formed during roasting	Reduce bitterness by ~50%

Why This Matters for the Coffee Industry

The findings highlight the critical importance of the roasting process in shaping coffee’s final sensory profile. Darker roasts, which generate more melanoidins, may offer stronger masking effects – a hypothesis the team plans to explore in future studies. For the specialty coffee world, this research opens exciting possibilities: improving instant and ready-to-drink coffees by optimizing melanoidin content, developing low-bitterness blends while maintaining satisfying caffeine levels, and refining roasting techniques to craft more balanced and approachable cups.

“The significance of this work lies in explaining why coffee beverages do not taste of caffeine, even though the caffeine concentration of coffee is far above the perceivable level,” said Michael Gigl of TUM’s ZIEL Institute for Food and Health.

A Symphony of Chemistry

Coffee contains hundreds of compounds that contribute to its complex flavor. While caffeine is the most famous bitter player, the study underscores that the overall taste emerges from intricate interactions rather than any single molecule. As Gigl and colleagues concluded, a “plethora of bitter stimuli” generated during roasting ultimately creates coffee’s unique and beloved profile. So the next time you sip a perfectly balanced espresso or pour-over, remember: you are not just tasting beans and water. You are experiencing a masterful chemical performance – one in which the roast itself quietly tames the bitterness and lets the aroma and nuance shine through.

Frequently Asked Questions About Coffee Bitterness and Roasting

Q: Why doesn’t coffee taste extremely bitter despite containing caffeine?

A: Because melanoidins formed during roasting bind to caffeine and prevent it from reaching the bitter taste receptors on your tongue.

Q: What are melanoidins?

A: High-molecular-weight compounds formed during the Maillard reaction when coffee beans are roasted. They are responsible for the brown color and roasted flavor.

Q: Does the roast level affect coffee bitterness?

A: Yes. Darker roasts produce more melanoidins, which may enhance the bitterness masking effect. Further studies are needed to confirm this.

Q: How can these findings be used in the coffee industry?

A: They can help improve instant and ready-to-drink coffees, develop low-bitterness blends while maintaining caffeine levels, and refine roasting techniques.

Q: Was this study published in a peer-reviewed journal?

A: Yes, it was published in the Journal of Agricultural and Food Chemistry in 2026.

In every cup of coffee you enjoy, a complex chemical story unfolds. Roasting is not just a way to turn green beans brown – it is a precise tool for shaping flavor and making coffee balanced and pleasurable. Science is opening new frontiers in understanding and improving this ancient beverage.

Prepared and edited by: Qahwa World – Based on a scientific study from the Technical University of Munich and the Leibniz-Institute for Food Systems Biology, published in the Journal of Agricultural and Food Chemistry (2026).

Reference: Michael Gigl et al., “Impact of Interactions between Melanoidins and Caffeine on the Bitter Taste of Coffee Beverages,” Journal of Agricultural and Food Chemistry, 2026. DOI: 10.1021/acs.jafc.5c17022

Publication date: June 9, 2026

Chinese Study: Sweetened Coffee Linked to Lower Risk of Early Death

Posted on June 3, 2026 by Qahwa World

Source: American College of Physicians / Annals of Internal Medicine |
Date: June 3, 2026

Chinese Study: Sweetened Coffee Linked to Lower Risk of Early Death

Key Findings:

Study from Southern Medical University in Guangzhou tracked over 171,000 people for 7 years.
Unsweetened coffee reduced death risk by 16 to 21 percent.
Coffee sweetened with one teaspoon of sugar per cup reduced risk by 29 to 31 percent.
Results for artificial sweeteners were inconclusive.
The study is observational, not experimental. It does not prove direct cause and effect.
Warning: Ready-made coffee drinks from chains contain much higher amounts of sugar.

Researchers from Southern Medical University in Guangzhou, China, published a new study in the journal Annals of Internal Medicine. The study examined the effect of sweetened coffee on the risk of early death. It included more than 171,000 participants from the UK Biobank project. The average follow-up period was about seven years.

As a result, the study found that drinking moderate amounts of coffee, whether sweetened or unsweetened, is associated with a lower risk of death. This research is one of the first large-scale studies to directly compare the effect of adding sugar to coffee on long-term health outcomes.

Key Results: Up to 31 Percent Lower Death Risk

The researchers divided participants into groups based on their coffee consumption. These groups included non-drinkers, unsweetened coffee drinkers, sugar-sweetened coffee drinkers, and artificially sweetened coffee drinkers. After seven years of follow-up, the results were clear.

First, people who drank any amount of unsweetened coffee were 16 to 21 percent less likely to die compared to non-drinkers. Second, those who drank 1.5 to 3.5 cups per day of sugar-sweetened coffee were 29 to 31 percent less likely to die. The researchers noted that these participants added only about one teaspoon of sugar (approximately 4 grams) per cup on average.

In contrast, the results for those who used artificial sweeteners were inconclusive. The reduced risk applied to deaths from cancer and cardiovascular disease as well.

Summary of Results

Coffee Type	Daily Amount	Reduction in Death Risk
Unsweetened coffee	Any amount	16% to 21%
Sugar-sweetened coffee (1 tsp per cup)	1.5 to 3.5 cups	29% to 31%
Coffee with artificial sweeteners	Varies	Inconclusive

Why Is Coffee Beneficial? Possible Mechanisms

Coffee contains biologically active compounds that offer potential health benefits. The most important are antioxidants and polyphenols, especially chlorogenic acids. These compounds fight oxidative stress and inflammation. They also improve blood vessel function and glucose metabolism. In addition, caffeine enhances cognitive function and may reduce the risk of neurodegenerative diseases.

As a result, moderate coffee consumption has been linked to a lower risk of type 2 diabetes, stroke, heart disease, certain cancers, liver disease, and depression. However, the question remains: why did coffee with a small amount of sugar show even better results? Researchers believe that a small amount of sugar (one teaspoon) is not enough to cancel out the large benefits of coffee. But this needs further confirmation.

Important Caveats: Not a License to Add Excess Sugar

The researchers emphasize that these results do not mean adding sugar to coffee is beneficial in itself. The study observed an association, not a direct causal relationship. It is possible that people who regularly drink sweetened coffee also have a generally healthier lifestyle. Furthermore, the amount of sugar used in the study was very small (one teaspoon per cup).

In contrast, ready-made coffee drinks from major chains contain much larger amounts of sugar. A single drink can contain 20 to 50 grams of sugar. This far exceeds health recommendations. The World Health Organization recommends that free sugars should be less than 10 percent of daily calories. For an average adult, that is about 50 grams (12 teaspoons) per day. The ideal amount is less than 5 percent (25 grams or 6 teaspoons).

Therefore, researchers advise drinking coffee black or with a very small amount of sugar (no more than one teaspoon per cup). Avoid heavily sweetened drinks, heavy cream, and flavored syrups. Home brewing is preferable for better control of ingredients. Individuals with insomnia, anxiety, or stomach issues should consult their doctor.

Frequently Asked Questions About the Sweetened Coffee Study

Q: Does this study prove that adding sugar to coffee is healthy?

A: No. The study found a statistical association, not a causal relationship. The amount of sugar used was very small (one teaspoon per cup). A generally healthy lifestyle may also play a role.

Q: What is the optimal amount of coffee per day according to the study?

A: The optimal range is 1.5 to 3.5 cups per day. This amount was linked to the largest reduction in death risk.

Q: Do the results apply to instant coffee?

A: Yes, the study included various types of coffee. However, benefits are usually greater with filtered or freshly ground coffee.

Q: What is the daily sugar limit according to global guidelines?

A: The WHO recommends less than 10 percent of daily calories (about 50 grams or 12 teaspoons). The ideal is less than 5 percent (25 grams or 6 teaspoons).

Q: What about coffee with artificial sweeteners?

A: The results were inconclusive. There is not enough evidence of benefits or harms from this study.

Q: Can I drink sweetened coffee from commercial coffee shops?

A: Most coffee shop drinks contain very high amounts of sugar (20 to 50 grams). This may cancel out potential benefits and increase health risks. It is better to order black coffee or add a small amount of sugar yourself.

Prepared by: Scientific News Unit – Qahwa World – based on a study published in Annals of Internal Medicine on May 31, 2022, and the accompanying press release from the American College of Physicians.

Disclaimer: This information is for educational purposes and does not replace medical advice.

Publication date: June 3, 2026

South Korea Tightens Regulations on Decaffeinated Coffee

Posted on May 14, 2026 by Qahwa World

Dubai – Qahwa World

South Korea’s Ministry of Food and Drug Safety has announced stricter regulations for decaffeinated coffee products, stating that products will only be allowed to carry the “decaffeinated” label if they contain no more than 0.1% residual caffeine in the coffee beans.

The new labeling standards are set to take effect on January 1, 2028.

Under the current rules, at least 90% of the caffeine must be removed from coffee for it to be classified as decaffeinated. However, existing regulations do not specify the final amount of caffeine that may remain in the product. The term “decaffeinated” also does not necessarily mean that the coffee is completely caffeine-free, which can lead to consumer misunderstanding.

The ministry explained that some decaffeinated coffee products may still contain relatively high levels of residual caffeine, especially when made from naturally high-caffeine coffee beans. This, officials said, conflicts with consumer expectations that decaffeinated coffee should contain little to no caffeine.

To reduce confusion, the updated standards will focus on the amount of caffeine remaining in the beans, aligning South Korea’s regulations more closely with international standards, including those used in the United States.

In a related move, the ministry also strengthened labeling requirements for alcoholic beverages amid a rise in collaborative products featuring alcohol brands packaged in designs resembling ordinary food products.

Some Instant Coffee Types Have Higher Caffeine Content

Posted on May 5, 2026May 5, 2026 by Qahwa World

Dubai – Qahwa World

A recent analysis highlights how widely caffeine levels can vary across instant, ground, and takeaway coffees. In some cases, a large cup can reach or exceed 400 milligrams of caffeine, a level often referenced as the daily upper intake for healthy adults.

Large variation across coffee types

Testing of popular products revealed that caffeine content is not consistent. Differences in roast style, brewing method, and serving size all play a role in how much caffeine ends up in a cup.

Among grocery products, espresso-style ground coffee showed the highest levels. For takeaway drinks, stronger dark roast options ranked among the most concentrated.

Estimated caffeine levels in home brewed coffee

Coffee Brand / Type	Small Cup (8 oz)	Large Cup (24 oz)
Nescafé Taster’s Choice Instant	42 mg	125 mg
Folgers Classic Roast Instant	57 mg	170 mg
Starbucks Blonde Roast Instant	76 mg	227 mg
Black Rifle Coffee Blackbeard’s Delight	79 mg	236 mg
Starbucks Pike Place Medium Roast	92 mg	277 mg
Peet’s Major Dickason’s Blend Dark Roast	104 mg	311 mg
Maxwell House Breakfast Blend	113 mg	338 mg
Starbucks Veranda Blend Light Roast	120 mg	361 mg
Cameron’s Breakfast Blend	123 mg	368 mg
Dunkin’ Blueberry Muffin Medium Roast	132 mg	397 mg
Good & Gather Caramel Macchiato	133 mg	400 mg
Bones Coffee Highland Grog	135 mg	406 mg
Green Mountain Caramel Vanilla Cream	140 mg	420 mg
Café Bustelo Espresso Ground Coffee	175 mg	524 mg

Takeaway coffee caffeine levels

Coffee Chain	Small Cup (12 oz)	Large Cup (20 oz)
Dunkin’ Original Blend	175 mg	291 mg
McCafé Premium Roast	177 mg	295 mg
Starbucks Pike Place	248 mg	414 mg
Peet’s Major Dickason’s Blend	281 mg	468 mg

Why caffeine awareness matters

Many coffee products do not clearly display caffeine content. This makes it difficult for consumers to track intake, especially when portion sizes and brewing styles vary.

General guidance suggests that up to 400 milligrams per day is a reasonable limit for most healthy adults. However, a single large cup from some brands can approach or exceed that amount.

Potential benefits of moderate intake

Moderate caffeine consumption is associated with improved alertness, concentration, and physical performance. Some long term research also suggests a possible link between coffee consumption and reduced cognitive decline, though findings are not uniform.

Who should limit caffeine

Some individuals may need to monitor their intake more closely, including those who are pregnant, people with anxiety conditions, individuals with heart related concerns, and those taking medications that interact with caffeine.

Effects of excessive caffeine

High intake can lead to sleep disruption, restlessness, increased heart rate, and digestive discomfort. Regular high consumption may also result in dependence, with withdrawal symptoms such as headaches or fatigue.

Final thoughts

Caffeine levels in coffee are not standardized. Paying attention to serving size and coffee type can help avoid unintentionally consuming more caffeine than expected.

Coffee’s Hidden Health Boost Goes Beyond Caffeine

Posted on April 23, 2026April 23, 2026 by Qahwa World

Dubai – Qahwa World

A recent study published in Nature Communications reveals that coffee’s impact reaches well beyond its caffeine content. Researchers report that both regular and decaffeinated coffee can influence gut bacteria in ways that may support mood, lower stress levels, and enhance brain function.

The research, led by scientists at APC Microbiome Ireland, examined how coffee interacts with the gut microbiome a vast network of microorganisms essential to overall health. The findings suggest that coffee plays a role in shaping this internal ecosystem, with potential benefits for emotional and mental well-being.

Exploring the Gut–Brain Link

“Coffee is more than just caffeine it’s a complex dietary factor that interacts with our gut microbes, our metabolism, and even our emotional well-being,” said John Cryan, PhD, principal investigator and co-author of the study.

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The research focused on the gut–brain axis, a bidirectional communication system connecting the digestive system and the brain. Scientists aimed to understand whether coffee’s influence on mood and cognition could occur independently of caffeine.

Study Design and Approach

The study included 62 participants, divided evenly between regular coffee drinkers—consuming three to five cups per day and non-drinkers. Researchers gathered psychological evaluations, dietary data, and biological samples such as stool and urine.

You can also read: Italian-Style Coffee Linked to Lower Risk of Common Liver Disease

Participants who regularly consumed coffee were asked to stop for two weeks. Afterward, both groups were reintroduced to coffee under controlled, blinded conditions, with some receiving caffeinated coffee and others decaf. This setup enabled researchers to isolate the effects of coffee on the gut microbiome while monitoring changes in stress, mood, and cognitive performance.

Main Outcomes

The results showed that both types of coffee were linked to several positive effects:
Measurable changes in gut microbiome activity.
Lower levels of perceived stress, depression, and impulsivity.
Better mood and improved focus.
Reduced anxiety and inflammation risk in those consuming caffeinated coffee.
Enhanced learning and memory associated with decaffeinated coffee.
Increased presence of beneficial gut bacteria tied to digestion and emotional health.

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Researchers identified a rise in helpful bacteria, including Eggerthella species and Cryptobacterium curtum, known for supporting digestive balance and limiting harmful microbes. An increase in Firmicutes bacteria associated with positive emotional states was also observed, particularly among women.

The Role of Decaf Coffee

Differences between the effects of caffeinated and decaffeinated coffee suggest that compounds other than caffeine, such as polyphenols, may contribute significantly to coffee’s mental and cognitive benefits.

“Our findings reveal how coffee influences both the microbiome and neurological responses,” Cryan noted. “It may change how microbes function collectively and the metabolites they produce.”

Rethinking Coffee’s Role

As scientific interest in diet-based strategies for gut health continues to grow, this study positions coffee as more than a daily ritual. It may also serve as a valuable component of a balanced lifestyle that supports both digestive health and mental well-being.

U.S. Troops Consumed Nearly 1 Million Gallons of Coffee During Iran Conflict

Posted on April 8, 2026 by Qahwa World

Washington — Qahwa World

The U.S. military consumed nearly one million gallons of coffee during the recent conflict with Iran, according to Gen. Dan Caine, chairman of the Joint Chiefs of Staff, as a fragile ceasefire begins to take hold.

Speaking to reporters following the announcement of a pause in fighting between the United States and Iran, Caine outlined the scale of daily consumption during Operation Epic Fury, which lasted nearly six weeks.

According to his estimates, troops consumed more than 6 million meals, around 950,000 gallons of coffee, approximately 2 million energy drinks, and large quantities of nicotine. He noted the figures while emphasizing the demanding conditions faced by service members.

Caine highlighted the intensity of the operational environment, describing it as harsh, unpredictable, and physically challenging. He praised U.S. personnel for maintaining resilience and carrying out their duties despite difficult and uncertain circumstances.

“This is tough and unforgiving work,” he said, noting that troops operated in conditions marked by heat, darkness, and constant uncertainty while continuing to fulfill their mission.

Defense Secretary Pete Hegseth stated that while the Pentagon has, for now, completed its immediate objectives, U.S. forces will maintain a presence in the region as the situation develops.

The ceasefire, announced earlier, is intended to create space for continued negotiations between the two sides.

Moderate Coffee Consumption May Reduce Dementia Risk

Posted on April 5, 2026 by Qahwa World

Dubai – Qahwa World

A comprehensive new study suggests that regular consumption of caffeinated coffee and tea may help protect against dementia and support cognitive health over the long term.

The research, published in JAMA on February 9, 2026, analyzed data from over 131,000 participants followed for up to 43 years. The study included women from the Nurses’ Health Study and men from the Health Professionals Follow-up Study, excluding individuals who had cancer, Parkinson’s disease, or dementia at the start. During the follow-up period, 11,033 cases of dementia were documented.

The study found that higher intake of caffeinated coffee was linked to a significantly lower risk of developing dementia. Participants in the highest consumption group—roughly two to three cups per day—experienced about an 18% lower risk compared with those in the lowest intake group. Similarly, moderate tea consumption—one to two cups per day—was associated with comparable benefits. Decaffeinated coffee, however, showed no significant impact on dementia risk or cognitive function.

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Researchers also observed improvements in cognitive performance among caffeinated coffee and tea drinkers. In the Nurses’ Health Study cohort, higher coffee intake correlated with slightly higher scores on the Telephone Interview for Cognitive Status and global cognition assessments. Subjective cognitive decline was also less common among those with moderate caffeinated beverage intake.

Dr. Dylan Wint, a neurologist at Cleveland Clinic, who was not involved in the study, noted that these findings reinforce the potential role of caffeine in brain health. “Caffeine may help reduce the accumulation of amyloid-beta, a protein implicated in Alzheimer’s disease, and it may also have other neuroprotective effects,” he explained.

While the study highlights promising associations, researchers and experts caution that more work is needed to confirm causality. Dr. Wint emphasized that maintaining brain health also requires a holistic approach, including a balanced diet, regular exercise, and mental engagement.

The study adds to a growing body of evidence that moderate consumption of caffeinated coffee and tea could be a simple, enjoyable strategy to support long-term cognitive health.

The Best Time to Drink Coffee, According to Experts

Posted on March 22, 2026March 22, 2026 by Qahwa World

Dubai – Qahwa World

For many people, coffee is the first step in starting the day. However, experts suggest that when you drink your coffee may influence how your body responds to it.

After waking up, the body naturally increases production of cortisol, a hormone linked to alertness. This typically peaks within the first 30 to 60 minutes. Some experts suggest that drinking coffee during this period may make caffeine feel less effective, as the body is already in a naturally alert state.

Hydration is another factor to consider. After several hours of sleep without fluids, the body may be slightly dehydrated. Drinking coffee before water may contribute to feelings of fatigue or dryness, particularly in people who are sensitive to caffeine.

Some individuals may also experience stomach discomfort when consuming coffee on an empty stomach, including increased acidity, although responses vary.

A commonly recommended approach is to wait 60 to 90 minutes after waking before having your first cup of coffee. This allows the body’s natural rhythm to settle and may help caffeine provide a more balanced and sustained energy boost.

Other morning habits can also influence energy levels. Diets high in sugar and low in protein may lead to fluctuations in energy, while exercising on an empty stomach may leave some people feeling fatigued. Immediate exposure to emails or screens may also contribute to early mental strain.

A more gradual start to the day may support steadier energy levels. Drinking water first, getting exposure to natural light, and delaying caffeine intake slightly are simple adjustments that [uncertain] may help improve how you feel later in the day.

43 Years of Data: How Coffee Affects the Brain and Memory

Posted on March 21, 2026April 1, 2026 by Qahwa World

Dubai – Qahwa World

Regular consumption of coffee and tea may do more than boost alertness—it could also play a role in maintaining cognitive health over time. This is suggested by findings from a large-scale analysis of more than 130,000 participants followed over a period of 43 years.

Throughout the study, participants regularly reported their dietary habits, health status, and changes in memory and thinking abilities. Over the course of the observation period, more than 11,000 individuals developed dementia. The analysis found that those who consumed caffeinated coffee in moderate amounts—about two to three cups per day—had an approximately 18% lower risk of developing dementia compared to those who rarely or never drank it. They also reported fewer subjective memory complaints and performed better on certain cognitive tests.

Similar patterns were observed among tea drinkers, with one to two cups per day associated with favourable outcomes. In contrast, decaffeinated coffee did not show a clear association with improved cognitive measures, suggesting that caffeine may play an important role in the observed effects.

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Researchers link these findings to compounds found in coffee and tea, including caffeine and polyphenols, which are believed to help reduce inflammation and protect brain cells from damage. Higher levels of caffeine intake did not appear to have harmful effects in this analysis, showing results comparable to moderate consumption.

Further analysis indicated that the association between caffeine intake and cognitive health was consistent regardless of genetic predisposition to dementia, highlighting the potential influence of lifestyle factors. At the same time, researchers emphasise that coffee and tea consumption represents only one part of a broader picture that includes diet, physical activity, sleep, and overall health.

The findings suggest that moderate, regular consumption of coffee or tea may contribute to maintaining cognitive function with age, though it should not be viewed as a standalone solution for preventing dementia.

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Decaf Coffee Effect Between Myth and Truth

Posted on February 15, 2026February 15, 2026 by Qahwa World

DUBAI – QAHWA WORLD

About half of all American adults started their day with a cup of coffee today, but new insights from health experts suggest that the resulting energy boost might not be coming entirely from the caffeine. Research indicates that for many habitual drinkers, the ritual of the morning cup may be just as powerful as the stimulant itself through what is known as the placebo effect.

The Power of the Ritual

According to experts, the simple act of brewing coffee at home or visiting a local coffee shop can activate a placebo response. Maura Fowler, a pediatric and adult dietitian based in Florida, points to a 2025 study suggesting that the energy boost associated with coffee is often tied to the sensory experience—the smell, the taste, and the expectation of alertness.

This is backed by a 2023 study which utilized brain imaging to show that coffee drinkers exhibit increased connectivity in brain regions responsible for vision and problem-solving. Interestingly, this effect was not as pronounced in individuals who took caffeine supplements, leading researchers to conclude that the habit and belief system surrounding the coffee routine significantly influence how the mind and body respond.

Physiological Realities vs. Psychological Effects

While the mind may be susceptible to the placebo effect, the body maintains a distinct reaction to caffeine. Dr. Gregory Marcus, a cardiologist at the University of California San Francisco, conducted a randomized trial involving habitual coffee drinkers to monitor heart health. His findings revealed that participants assigned to drink caffeinated coffee experienced more premature ventricular contractions (PVCs)—abnormal heartbeats from the lower chambers of the heart—compared to those drinking decaf.

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Fowler notes that while many switch to decaf to manage anxiety, insomnia, or gastrointestinal issues, even decaf contains small amounts of caffeine—typically between 2 and 15mg per serving—which can still affect those with extreme sensitivity.

Individual Differences in Caffeine Metabolism

The report further explains why caffeine affects people differently. Habitual consumption can lead to an increase in adenosine receptors, a substance that promotes relaxation. When these receptors increase, caffeine becomes less effective, often leading users to consume more to achieve the same result.

Genetic factors also play a vital role. In clinical trials, Dr. Marcus found that “fast metabolizers” experienced no impact on their sleep, while “slow metabolizers” (based on DNA samples) suffered from significantly reduced sleep quality on days they consumed caffeinated coffee.

Testing the Placebo Effect

For those curious to see if they can maintain alertness without caffeine, Dr. Marcus recommends a structured experiment rather than a sudden change. He suggests a week-by-week rotation between regular and decaf coffee to avoid the immediate “noise” of withdrawal symptoms, such as headaches, low mood, or difficulty concentrating. Research suggests that approximately 8% of adults suffer from “caffeine use disorder,” making the transition more difficult due to symptoms like nausea or insomnia.

The evidence suggests that while caffeine provides tangible nutrients like Vitamin B2, B3, potassium, and magnesium—and is linked to a lower risk of dementia—the placebo effect is powerful enough for many to maintain their routine with decaf without noticing a significant drop in productivity. Experts emphasize that while it is not dangerous to quit caffeine, understanding the psychological connection to the ritual can help individuals better manage their daily consumption.

Coffee in Ramadan: Between Traditional Flavor and Healthy Balance

Posted on February 14, 2026February 14, 2026 by Qahwa World

DUBAI – QAHWA WORLD

Coffee is the fine thread that weaves together spiritual serenity and social vitality during the nights of Ramadan. From the moment of Iftar until Suhoor, this “brown bean” becomes the protagonist of Arab gatherings, carrying the scent of history and the necessities of modern life.

The Cultural Map of Coffee in the Arab World

While methods of preparation and consumption vary across Arab geography, they all converge on the values of generosity and hospitality:

The Gulf Countries: “Saudi Coffee” and “Emirati Coffee” lead the scene. Prepared with a light roast, cardamom, and saffron, it is served in a “Dallah” with dates at Iftar to break the fast, helping to gently stimulate the digestive system.
The Levant: Turkish (boiled) coffee dominates the evening gatherings. Many prefer it “Sada” (plain/unsweetened) after Taraweeh prayers, and it is a fundamental pillar of family visits that extend late into the night.
Egypt and North Africa: “Mazbouta” (perfectly balanced sugar) coffee stands out as an indispensable ritual immediately after Iftar to restore focus. In Tunisia and Morocco, drops of orange blossom water may be added to enhance the unique Ramadan flavor.

The Golden Schedule (Managing Caffeine and Water)

A timeline to integrate coffee into your day without causing dehydration or insomnia:

Time Period	Suggested Action	Health Goal
At Iftar	Large glass of water + 3 dates (Avoid coffee)	Gently raise blood sugar and prep the stomach
2 Hours Post-Iftar	Your first cup of coffee	Stimulate the mind without upsetting the stomach
After Taraweeh	Drink 500ml of water + a light snack	Replace lost fluids and ensure hydration
Midnight	A small cup of coffee (Optional)	Enjoy the social flavor of the late-night “Sahar”
Suhoor Period	Water + Potassium-rich foods (No coffee)	Avoid the diuretic effect and thirst during fasting

Health Guidelines for Maximum Benefit

To enjoy coffee as a health ally rather than an enemy, these standards must be followed:

Moderation in Sweetening: One must adhere to the golden rule: 2.5 grams the maximum sugar to ensure the protective benefits of coffee remain and to keep the antioxidants active.
Avoid the “Suhoor Trap”: Consuming coffee during Suhoor leads to diuresis (increased urination), exposing you to severe thirst and headaches during the fasting hours.
Parallel Hydration: For every cup of coffee, you should drink at least two cups of water to compensate for the caffeine’s dehydrating effect.

Coffee as a Social Phenomenon (Journalistic Insight)

Coffee is no longer just a beverage; it is a “rhythm regulator” for the Ramadan day. In recent years, we have observed a notable shift; “Specialty Coffee” has begun to invade Ramadan tents. The younger generation is merging global preparation methods (like V60 and Chemex) with traditional atmospheres. This blend of modernity and heritage reflects the vitality of Arab society and its ability to evolve traditions to suit the spirit of the times.

Maintaining coffee rituals in Ramadan enhances the psychological state and reduces the stress resulting from changes in the biological clock, provided the timings mentioned in the table above are respected.

The Bottom Line

Coffee remains the faithful companion of those fasting, combining healthy authenticity with sensory pleasure. The secret lies in balance; enjoy its aroma and taste at the right times to ensure your fasting is comfortable and your nights are full of energy.