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Glass bottles may have more microplastics than plastic, shows French study
Most of us believe that glass bottles are a safer choice for drinking, don't we? But a new study has thrown a twist into this long-held assumption with surprising findings. Glass bottles may actually contain far more microplastics than plastic ones, in some cases, up to 50 times more.
A study conducted by France's food safety agency, ANSES, titled 'Microplastic contaminations in a set of beverages sold in France', published recently in the Journal of Food Composition and Analysis, examined popular beverages like soft drinks, beer, iced tea, and water. Beer bottles topped the contamination charts.
What did the study find?
Researchers from ANSES analysed 56 beverage samples including water, soft drinks, iced tea, lemonade, beer, and wine, packaged in different materials like plastic, glass, brick cartons, cans, and cubitainers. They found glass bottles had the highest microplastic contamination across most beverages.
On average:
Waters had the lowest contamination at 2.9 MPs per litre, but glass bottles still had higher levels than plastic
The researchers initially believed plastic would be the bigger culprit, but found the opposite.
Which beverages contained the most microplastics?
Here's a quick contamination snapshot (microplastic particles per litre):
Beer (glass bottles): ~133 MPs per litre
Lemonade (glass bottles): ~112 MPs per litre
Cola (glass bottles): ~103 MPs per litre
Iced Tea (glass bottles): ~86 MPs per litre
Water (glass bottles): ~4.5 MPs per litre
In contrast, plastic and canned versions of these drinks had significantly lower levels of microplastics.
Why are glass bottles contaminated?
It's not the glass itself, it's the caps.
The study found that most microplastic particles in beverages stored in glass bottles matched the colour and chemical composition of the paint used on the outside of the bottle caps. The caps, especially those made of metal with painted coatings, are likely shedding microplastics into the drink.
Experiments revealed that a simple cleaning method, blowing and rinsing the caps before sealing, could reduce microplastic contamination by about three times.
Besides packaging, other sources include:
Manufacturing processes: Screwing/unscrewing caps can introduce particles
Environmental exposure: Poor storage and handling
Paint and adhesives: Especially on caps and labels
Notably, wine bottles were the exception. They had lower contamination because they were sealed with cork stoppers instead of metal caps.
What are microplastics?
Microplastics are tiny plastic fragments less than five millimetres in size. They are found almost everywhere, from the deepest oceans to the food and drinks we consume. Studies have even found microplastics in human tissues like the brain and placenta.
Should you stop drinking from glass bottles?
Not necessarily. But this study is surely a wake-up call. The perception that glass is always the safer, cleaner option isn't as straightforward as we thought. For more health updates, follow #HealthWithBS
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2 days ago
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Glass bottles may have more microplastics than plastic, shows French study
Most of us believe that glass bottles are a safer choice for drinking, don't we? But a new study has thrown a twist into this long-held assumption with surprising findings. Glass bottles may actually contain far more microplastics than plastic ones, in some cases, up to 50 times more. A study conducted by France's food safety agency, ANSES, titled 'Microplastic contaminations in a set of beverages sold in France', published recently in the Journal of Food Composition and Analysis, examined popular beverages like soft drinks, beer, iced tea, and water. Beer bottles topped the contamination charts. What did the study find? Researchers from ANSES analysed 56 beverage samples including water, soft drinks, iced tea, lemonade, beer, and wine, packaged in different materials like plastic, glass, brick cartons, cans, and cubitainers. They found glass bottles had the highest microplastic contamination across most beverages. On average: Waters had the lowest contamination at 2.9 MPs per litre, but glass bottles still had higher levels than plastic The researchers initially believed plastic would be the bigger culprit, but found the opposite. Which beverages contained the most microplastics? Here's a quick contamination snapshot (microplastic particles per litre): Beer (glass bottles): ~133 MPs per litre Lemonade (glass bottles): ~112 MPs per litre Cola (glass bottles): ~103 MPs per litre Iced Tea (glass bottles): ~86 MPs per litre Water (glass bottles): ~4.5 MPs per litre In contrast, plastic and canned versions of these drinks had significantly lower levels of microplastics. Why are glass bottles contaminated? It's not the glass itself, it's the caps. The study found that most microplastic particles in beverages stored in glass bottles matched the colour and chemical composition of the paint used on the outside of the bottle caps. The caps, especially those made of metal with painted coatings, are likely shedding microplastics into the drink. Experiments revealed that a simple cleaning method, blowing and rinsing the caps before sealing, could reduce microplastic contamination by about three times. Besides packaging, other sources include: Manufacturing processes: Screwing/unscrewing caps can introduce particles Environmental exposure: Poor storage and handling Paint and adhesives: Especially on caps and labels Notably, wine bottles were the exception. They had lower contamination because they were sealed with cork stoppers instead of metal caps. What are microplastics? Microplastics are tiny plastic fragments less than five millimetres in size. They are found almost everywhere, from the deepest oceans to the food and drinks we consume. Studies have even found microplastics in human tissues like the brain and placenta. Should you stop drinking from glass bottles? Not necessarily. But this study is surely a wake-up call. The perception that glass is always the safer, cleaner option isn't as straightforward as we thought. For more health updates, follow #HealthWithBS
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