Show summary Hide summary
- Widespread contamination: every sample contained microplastics
- How the team tested drinks and counted particles
- Heat increases release of plastic particles
- Cold drinks still contain plastic, but levels vary by type and packaging
- Estimated daily intake from beverages
- Where microplastics go inside the body and why scientists are worried
- Researchers urge action and changes to reduce exposure
A new lab investigation suggests the drink in your hand could carry more than flavor. Scientists in the UK say tiny plastic fragments showed up in every beverage sample they examined, with hot drinks releasing the largest amounts. The discovery raises fresh questions about routine exposure and how simple choices might reduce it.
Widespread contamination: every sample contained microplastics
Researchers collected hundreds of samples of common drinks from supermarkets and coffee shops across the UK. After laboratory analysis, they reported microplastic particles in every single sample. The team analyzed a variety of drinks, including coffee, tea, sodas, energy drinks and fruit juices.
Eggs every day for months: simple check reveals shocking blood test result
Popular childhood food ingredient may raise adult anxiety: study
What the numbers mean
- Total samples examined: 155 individual drink specimens.
- Different drink types: 31 beverage categories, both hot and cold.
- Detection method: filtration followed by microscopic inspection and particle counting.
How the team tested drinks and counted particles
Scientists filtered each beverage to trap solid particles. Technicians then inspected the filters under microscopes to size and count fragments. The approach focused on particles from about one nanometer up to five millimeters.
Because even tiny temperature changes can affect packaging and lids, the study compared hot and cold versions of the same drinks. It also tested different serving containers, such as glass, disposable cups and aluminum cans.
Heat increases release of plastic particles
One clear pattern emerged: hot drinks often contained far more microplastics than cold ones. According to the analysis, heat appears to accelerate the shedding of plastic fragments from packaging, lids and other contact surfaces.
- Hot tea: averaged about 49–81 particles per liter.
- Iced tea: averaged about 24–38 particles per liter.
- Hot coffee: roughly 29–57 particles per liter.
- Iced coffee: about 31–43 particles per liter.
Hot tea served in disposable cups showed particularly high counts. On average, a single disposable cup delivered roughly 22 microplastic particles, versus about 14 particles per cup when the same tea was brewed and served in glass.
Cold drinks still contain plastic, but levels vary by type and packaging
Cold beverages were not free of contamination, though the particle loads tended to be lower.
- Fruit juice: 19–41 particles per liter.
- Energy drinks: 14–36 particles per liter.
- Soft drinks: 13–21 particles per liter.
Packaging had an influence. Drinks packaged in aluminum cans generally showed fewer microplastic particles than those in plastic bottles or disposable cups.
Estimated daily intake from beverages
The researchers combined laboratory results with a consumer survey of more than 200 adults to estimate how many particles people might ingest from drinks each day.
- Average intake for women: roughly 1.7 particles per kilogram of body weight per day from beverages alone.
- Average intake for men: roughly 1.6 particles per kilogram per day.
These figures focus only on exposure from drinks. They do not include microplastics that enter the body through food, air or other routes.
Where microplastics go inside the body and why scientists are worried
Microplastic particles have been detected in human blood and in several organs and tissues. Scientists have found traces in the lungs, liver, kidneys, brain, reproductive organs and even placental tissue.
Laboratory and animal studies suggest these particles can:
- Damage cells and disturb normal function.
- Alter gut bacterial communities.
- Trigger inflammation and immune responses.
- Carry and release chemical pollutants, such as heavy metals and hormone-disrupting compounds.
Those chemical contaminants may interact with biological systems and affect metabolism, reproduction and other vital processes. Long-term human health impacts remain under investigation.
Researchers urge action and changes to reduce exposure
Study authors argue the evidence supports steps to lower consumer exposure. They point to packaging, serving temperature and material choices as areas that can be addressed with policy and industry changes.
One of the lead scientists said the findings show microplastics are now part of everyday life and called for regulatory measures to limit human contact. He stressed that small changes, including choosing cooler drinks or avoiding disposable plastic cups, can reduce the number of particles released into beverages.
