Tag: microplastics

Researchers Warn of Hidden Microplastic Threat in Coffee Pods

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Dubai – Qahwa World

As awareness of microplastic pollution continues to rise, new research is drawing attention to an unexpected source—coffee pods. Despite efforts to reduce plastic waste through reusable cups and eco-friendly alternatives, experts warn that the daily coffee ritual may be exposing millions to microscopic contaminants.

A Hidden Risk in Convenience

Coffee pod machines, used by roughly one-third of American coffee drinkers, offer undeniable convenience—just insert a pod, press a button, and brew. But researchers say that convenience comes with a cost.

A recent TIME Magazine report posed a critical question: What happens to the plastic in single-serve coffee pods? The concern lies in microplastics, particles less than five millimeters in size that are shed as plastic breaks down or when it is exposed to heat.

Evidence from Hot Beverages

In a study published in Science of the Total Environment, British environmental chemist Professor Mohamed Abdallah and his team found that every hot beverage sample tested contained microplastics, with higher levels in hot drinks compared to cold ones. While coffee pods weren’t specifically tested, the findings suggest that heat exposure during brewing may accelerate plastic particle release.

“Our understanding of the toxicity of microplastics remains in its infancy,” Abdallah said, noting that these particles have only been studied since 2004.

Inside the Human Body

Microplastics have been found nearly everywhere — from the deepest ocean trenches to human blood, lungs, and even the brain. Their small size allows them to travel through the environment and the human body unnoticed.

Environmental engineer Justin Boucher from the Food Packaging Forum added: “We already have evidence that many plastics and related microplastics contain hazardous chemicals that can cause harm.”

According to TIME, even the water in coffee machines can contain microplastics — and the brewed coffee may have nearly two-thirds more contaminants than the water used to make it.

What Can Be Done

Despite growing evidence, no specific government regulations currently address microplastic exposure. Researcher Tracey Woodruff from the University of California told TIME that meaningful change depends on both policymakers and industry leaders.

Still, experts advise individuals to reduce plastic use where possible, opt for metal or glass alternatives, and avoid single-use plastics when practical. “Don’t aim for perfection,” Woodruff said. “Every small step matters, and the bigger shift will come from collective action.”

British Study: Hot Drinks Contain the Highest Levels of Microplastics

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London – August 28, 2025 (Qahwa World) – A peer-reviewed study from the University of Birmingham has found that everyday hot beverages—especially tea and coffee—contain the highest concentrations of microplastics among popular drinks tested, raising fresh questions about packaging, preparation practices, and real-world exposure. The paper, published in Science of the Total Environment, analysed 155 widely available drinks sold in UK supermarkets and coffee shops and is the first to assess human exposure via total beverage intake rather than water alone.

Researchers reported microplastics in every sample. Hot tea recorded the highest average concentration at 60 ± 21 particles per litre, followed by hot coffee at 43 ± 14 particles per litre. By comparison, iced tea averaged 31 ± 7, iced coffee 37 ± 6, fruit juices 30 ± 11, energy drinks 25 ± 11, and soft drinks 17 ± 4 particles per litre. Detected particle sizes ranged from 10 to 157 μm. The study also found a statistically significant difference between hot and cold beverages, indicating that temperature enhances the leaching of microplastics from packaging into drinks.

Packaging emerged as a critical factor. The authors highlight that higher temperatures increase microplastic release from packaging and that plastic packaging contributes to the contamination observed in beverages. In hot coffee served in disposable paper cups with polypropylene (PP) caps, PP microplastics predominated—strong evidence that cup materials are a primary source. Similar packaging-linked patterns appeared for iced products sold in PET bottles.

Beyond quantifying contamination, the study models realistic exposure by combining laboratory results with a survey of UK adults’ daily drink consumption. The estimated daily intake via total beverage consumption averages 1.6–1.7 microplastic particles per kilogram of body weight per day for men and women, respectively—a materially higher figure than previous estimates based on water alone. The authors conclude that focusing exposure assessments solely on tap or bottled water underestimates total intake because other beverages contribute substantially.

Contextualising these results, the research team notes that prior work by the same group measured broadly similar microplastic levels in UK tap and bottled water, underscoring that the higher counts now seen in hot tea and coffee represent an additional exposure pathway. The paper also synthesises evidence from multiple countries showing packaging and handling as recurring factors—ranging from release from tea bags to particles in soft drinks—while emphasising the novelty of testing a broad range of hot and cold beverages from a single market and pairing those measurements with consumption data.

Mechanistically, the findings are consistent: heat accelerates the transfer of particles from polymer-lined cups and lids, while materials such as PP, PET, polystyrene, polyethylene, and others appear across drink categories, mirroring common packaging choices. The authors cite previous studies that similarly link high temperature to increased microplastic release and demonstrate that both container material and product format (for example, single-use cups or PET bottles) shape the polymer “fingerprint” detected in the drink.

Public-health implications, while still being delineated by the broader scientific community, are clear enough to prompt the study’s call for more comprehensive risk assessments and policy responses. The authors characterise this work as a critical step toward understanding real-life exposure and urge regulators and industry to consider the combined effects of packaging materials, preparation conditions, and consumption habits when setting guidelines to limit human exposure.

The Birmingham team underscores limitations that likely make their exposure estimates conservative. Analytical methods in this study quantified particles ≥10 μm; smaller microplastics and nanoplastics—potentially more bioavailable—were outside detection limits. Nevertheless, with microplastics present across all categories tested and highest in hot beverages integral to daily routines, the evidence base now more firmly indicates that the act of making and serving hot drinks in common packaging can materially influence what ends up in the cup.

For consumers and producers alike, the study’s takeaway is practical: materials and temperature matter. For policymakers, the message is systemic: exposure assessments built solely on drinking water do not reflect the way people actually consume liquids. As the authors conclude, more accurate, comprehensive, and realistic exposure studies are needed to support effective environmental and public-health interventions.

Source: University of Birmingham, “Synthetic microplastics in hot and cold beverages from the UK market: Comprehensive assessment of human exposure via total beverage intake,” Science of the Total Environment 996 (2025) 180188.