Comments by "EebstertheGreat" (@EebstertheGreat) on "On cutting boards, microplastics and bacteria" video.
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@justaweeb1884 Microplastics are sizable particles of solid plastic. They do not dissolve in water, so they cannot possibly be excreted in any meaningful quantity in sweat. People confuse microplastics for their monomeric components like BPA, which is not the same thing. Just like solid chunks of cellulose are not the same as some dissolved glucose, microplastics are not the same as dissolved BPA. Moreover, microplastics are present in the water supply. If you sweat, that requires you to drink more water, meaning you will actually increase the microplastic concentration using this method (at least briefly).
As for metals, these are eliminated from the blood by the liver or kidneys (depending on the metal). They will be present in tiny quantities in sweat because they are slightly soluble in water, but they will also be present everywhere else in your body. You will eliminate hundreds of times more of the metals by just urinating, which is the other way that water is going to get out of your body anyway. Drinking a lot of water may slightly help remove metals, but that will be true whether you sweat or not. And of course, there are heavy metals in your water too (and no, you cannot filter those out).
The one thing that is proven to reduce heavy metal concentration is to avoid exposure, i.e. don't eat or drink things high in heavy metals. No matter what "detox" plan you try to follow, it will do basically nothing compared to just avoiding it in the first place. The one plate of fish you ate this week will have far more mercury than you will sweat out in your sauna detox or whatever.
And yes, this is backed up by every expert you consult. I don't mean SaunaHealthAndRealWellnessWithDrJimbo dot org, I mean actual credentialed experts. They aren't all in on a big conspiracy to keep lead in your blood or whatever, just saying what the research shows.
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