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submitted 1 month ago by MicroWave@lemmy.world to c/world@lemmy.world

Summary

A new study from Spain’s Autonomous University of Barcelona reveals that tea bags made from nylon, polypropylene, and cellulose release billions of micro- and nanoplastic particles when steeped in boiling water.

These particles, which can enter human intestinal cells, may pose health risks, potentially affecting the digestive, respiratory, endocrine, and immune systems.

Researchers urge regulatory action to mitigate plastic contamination in food packaging.

Consumers are advised to use loose-leaf tea with stainless steel infusers or biodegradable tea bags to minimize exposure.

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[-] FlyingSquid@lemmy.world 119 points 1 month ago

What isn't releasing billions of microplastic particles? We're fucked.

[-] andrewta@lemmy.world 56 points 1 month ago

When someone is getting laid and he drops a load in her, he’s probably injecting microplastics.

Just a thought for next time you are in bed with someone.

[-] FlyingSquid@lemmy.world 39 points 1 month ago

And if you don't- the condom? Also releasing microplastics. That glass of water you have afterwards because you're all hot and sweaty and thirsty? Also full of microplastics.

[-] SynonymousStoat@lemmy.world 22 points 1 month ago

As long as you're using latex/nitrile condoms you should be good as latex and nitrile aren't plastics. Some of the alternatives for people with latex allergies can have plastic in them though.

[-] SpruceBringsteen@lemmy.world 7 points 1 month ago

Smell that sheepskin condom?

You just inhaled plastics.

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[-] tiefling 18 points 1 month ago

My tinfoil hat theory is that we're going to find out that toothbrushes are a major source of them

[-] Anarki_ 14 points 1 month ago
[-] Dasus@lemmy.world 7 points 1 month ago

Vegans hate this one trick to avoid microplastics from toothbrushes; horsehair toothbrush.

Also, you guys rinse your mouths, right?

[-] SoleInvictus 5 points 1 month ago* (last edited 1 month ago)

Rinse your mouth? No thank you, I swallow it all! I paid for that toothpaste and I'm getting my money's worth.

[-] Classy@sh.itjust.works 5 points 1 month ago

Not even micro. There is a nonzero chance you've ingested the bristles at some point

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[-] ChicoSuave@lemmy.world 76 points 1 month ago

This warning only applies to the pyramid tea bags and not the paper sachet.

[-] random_character_a@lemmy.world 28 points 1 month ago* (last edited 1 month ago)

It did list cellulose bags as one source, however I don't quite understand how. Additive to strengthen the material?

[-] Danquebec@sh.itjust.works 11 points 1 month ago* (last edited 1 month ago)

Plastic coating to make the bag more resistant to heat.

[-] Eiri@lemmy.ca 11 points 1 month ago

Oh my god. I think I'll just go back to my teapot.

[-] Teanut@lemmy.world 11 points 1 month ago

Cellulose isn't plastic though, it's the sugar that makes up plant cell walls, like wood. Cotton fibers are 90% cellulose https://en.wikipedia.org/wiki/Cellulose

I'm confused why they included cellulose without clarifying that it's not a petrochemical, unless cellulose micro and nano particles are also an issue now. Maybe I should read the original study...

[-] Danquebec@sh.itjust.works 9 points 1 month ago

What I meant to say is that the cellulose is coated with plastic. I learned this from another post in the same thread.

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[-] Lemming6969@lemmy.world 6 points 1 month ago

They close the bags with a dot of plastic based glue so it doesn't open

[-] tektite@slrpnk.net 15 points 1 month ago

The square with crimped edges bags have plastic in the paper so that the edges will fuse closed.

[-] Lumidaub@feddit.org 38 points 1 month ago* (last edited 1 month ago)

Consumers are advised to ...

Consumers are advised to check whether tea bags in their region are even made of these materials.

Edit: Also, "billions"? The cookie warning is borked on the foodandwine.com article so I can't read it but: https://www.dpa-international.com/trends-and-features/urn:newsml:dpa.com:20090101:250109-99-540705/ "Tea bags releasing 'millions' of microplastics into tea, study shows" - where does that difference come from?

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[-] splinter@lemm.ee 32 points 1 month ago

No it doesn’t. This study is unscientific garbage and should be retracted.

Their “simulation” of making tea involved 300 teabags boiled in 600ml of water at 95 C while being stirred at 750rpm for an unspecified amount of time. They then took counts using undiluted samples of that liquid.

It isn’t clear why they chose such an absurd methodology, but it is absolutely spurious to draw conclusions from this about teabags used under normal conditions.

[-] sem 17 points 1 month ago

I've worked in a lab before. You would do it this way for a bunch of reasons.

First it's more reliable to measure something if there's a lot than a little. The effects of your measurement uncertainties and your error professional goes down. So better to measure 300 teabags than just 1 if you can find out the same thing from doing it that way.

As others have said, 95 deg C is hot, but it is well short of a boil.

The magnetic stir bar doesn't blend the water, it just moves it around into a swirl, even at 750 rpm because it's small.

If the ideal study would be to steep 1000 teabags in teacups with just-boiled water and measure the micro plastics to see how much is released on average, I can see why they did it this way instead when their focus was on what type of plastic is released vs exactly how much. I'm not sure the food and wine journalist did a great job walking the reader through this though.

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[-] DeltaSMC@lemmy.world 7 points 1 month ago* (last edited 1 month ago)
[-] splinter@lemm.ee 9 points 1 month ago

I mean nothing about the methodology is even close to representing normal tea brewing behavior.

For starters, a typical cup of tea is around 300-350ml, not 2ml and certainly not 1, so the low end is already down to 23,371 particles even before accounting for the brewing technique.

Secondly, nobody holds their tea at an active boil while stirring it at 750 rpm. That’s virtually blending it. There isn’t a meaningful way to compare that to typical tea brewing behavior but I wouldn’t be surprised to learn that it produced 10,000x more particles.

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[-] Machinist@lemmy.world 6 points 1 month ago

You can't draw any real world conclusions from this methodology.

Apples are safe to eat even though the seeds contain arsenic. Take a bunch of seeds and put them in a blender and test it. That test will show them being toxic.

I would like to see a methodology that is closer to real world use. No way to know if it's a real problem.

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[-] portuga@lemmy.world 7 points 1 month ago

So can I still have my tea or what? I’m inclined to trusting you over some barcelonians

[-] splinter@lemm.ee 8 points 1 month ago

Yeah, just don’t put your teabag in a blender.

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[-] FartsWithAnAccent@lemmy.world 31 points 1 month ago* (last edited 1 month ago)

No it's not, because I use a stainless steel capsule and loose leaf tea, which is superior in every way (even if microplastics weren't an issue).

If you don't make your tea like this, do yourself a favor and upgrade to some quality loose leaf!

Edit: lol, I love that this is getting downvotes. Are there disposable teabag enthusiasts out there?

[-] yannic@lemmy.ca 33 points 1 month ago

Your tea bag...

No, it's not, because I use something other than tea bags.

That's you. That's what you wrote.

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[-] tiefling 7 points 1 month ago* (last edited 1 month ago)

I wish stainless steel infusers weren't dogshit for rooibos :(

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[-] Lennnny@lemmy.world 23 points 1 month ago

How many micro plastics are released when I cry?

[-] random_character_a@lemmy.world 17 points 1 month ago

Has anyone checked how much particles I produce when I wash my fleece jacket.

[-] P1nkman@lemmy.world 9 points 1 month ago
[-] JoshuaFalken@lemmy.world 6 points 1 month ago

Certainly not an expert in the field here, but I'm not sure there's much environmental benefit from laundry bags of that sort, given the collected microplastics optimistically end up - Germany excluded - collated in your local landfill.

Guppyfriend even recommends sealing them in a container for disposal to ensure they don't blow around during waste collection and transport. This assumes of course that you can successfully transfer microplastic fibres from a large bag into a small container without spillage, but that's a matter separate from my conjecture.

Guppyfriend's FAQ

Source

While I don't think any particular company that makes similar bags is purposefully guilty of this, the marketing strategy used to promote these as environmentally responsible products just smells like greenwashing to me.

The ones I've had are also made of synthetic materials, and so eventually break down and begin releasing their own fibres.

Frankly, the true environmental benefit I see is something I've never seen advertised: I can wash groups clothes I want kept from intermingling in the same load and therefore run the machine half as often.

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[-] frazorth@feddit.uk 15 points 1 month ago

No!

biodegradable tea bags

You want "compostable" or better, "home compostable". Biodegradable is a word that is completely twisted, and items that include plastics will use that word no matter how untruthful it is to the spirit of the meaning.

[-] DudeImMacGyver@sh.itjust.works 6 points 1 month ago* (last edited 1 month ago)

Even a lot of the stuff labeled as "compostable" doesn't really compost under real life conditions, if you want to avoid this (and make better tea) just use loose leaf and a reusable metal pods or pour it through a fine mesh strainer. No microplastic bullshit and it just tastes better than the stale bagged shit.

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[-] Redditsux@lemmy.world 14 points 1 month ago

OMG. That's a good way to start the new year. Now my daily tea is going to be filled with guilt and worry.

[-] reddig33@lemmy.world 19 points 1 month ago

Just buy paper tea bags or loose leaf tea. The article is talking about those stupid nylon “pyramid” tea bags.

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[-] Wahots@pawb.social 5 points 1 month ago

You can switch to loose leaf. I thought loose leaf sucked because the tea bits always got in it. Then I found a metal filter that has like, 180nm holes in it. Extremely fine mesh.

I use it more than paper tea bags now!

[-] Shortstack@reddthat.com 6 points 1 month ago

This is why I simply tear open the tea bags and dump them into a fine mesh stainless steel basket and set it in the cup.

I have yet to find loose leaf tea tasty enough to repeat buy but I do have 3-4 flavors of bagged tea I always keep stocked.

The biggest downside to doing my favorite bagged teas this way is it’s a pain to clean out the metal basket when I just want another cup the next day, but to me the trade off on sidestepping the microplastic issue is worthwhile

[-] AI_toothbrush@lemmy.zip 6 points 1 month ago

I think the new eu bottle caps as well(even when using milk cartons) becuse when you open it they usually have a piece sticking out on the cap that catches on the threads to keep it open, and sometimes i see small plastic pieces flying everywhere when i open one of them. Presumably the plastic catch is breaking pieces of the thread off.

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[-] Psychonaut1969@lemmy.world 5 points 1 month ago* (last edited 1 month ago)

Cool, now do coffee pods.

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this post was submitted on 10 Jan 2025
390 points (100.0% liked)

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