There are two major claims with regards to Microbeads:
- A lot of people say that they're bad for the environment, to the point that states and nations are banning them. As evidence, here's the Wikipedia page which mostly talks about how they enter the ocean and how they are being banned by various governments. A key thing missing from that page, however, is the actual evidence that microbeads go on to do bad things once they enter the environment. Yes, fish eat them, but they eat rocks, too. They're not particularly intelligent and the things that they shouldn't eat just pass through their systems. So - is there some actual evidence that they do something bad once they enter the environment? Are they not harmlessly passed through digestive systems?
- Companies put the beads into cosmetic products because they supposedly exfoliate your skin more and somehow clean it better. Is there any evidence that shows that the beads actually do anything to clean you better?