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Like what? Mostly air, water, carbohydrate/fat/protein/vitamins, and toxins.
by Evbn 14y ago
Like what? Mostly air, water, carbohydrate/fat/protein/vitamins, and toxins.
- mistercow 14y agoAh yes, the seven classical elements.
- pkulak 14y agoI just mean that our cells are very large, compared to what other materials are made of. How about bleach? Sand? Dirt? Soap? Lotion? Bug spray? Makeup? Our skin is a pretty good barrier. Not saying that this stuff is safe, of course, but I don't think you can say it's unsafe because it's made of molecules that are small.
- ncallaway 14y agoI think the concern isn't over particles that are just smaller than our cells; it's over particles that are _significantly_ smaller that our skin cells. The idea being the particles have to be small enough to diffuse across the cell membrane to be a concern. Something half the size of a cell is going to have a very hard time permeating a cell membrane. That send, another commenter (far more knowledgable on the topic than I) above points out that these aren't actually nano-scale particles. They are roughly on the same scale as a cell, and thus your point may hold in this context.
- sliverstorm 14y agotoxins ... maybe it is time to say goodbye to HN after all.