Hey Abigail, thanks a lot for your feedback, it's always important to me to see the reaction of non-molecular-biologist-people to my posts!

Maybe I have to better describe "not regulated at all" a bit more specific... of course they also have to abide to some laws: They are not to allowed produce supplements with ingredients that are proven toxins in the supplied concentrations.
What I meant is that in opposite to producers of pharmaceuticals, they do not have to prove that their products are safe. And it's a huge difference between having to prove your product is safe in order to sell it and being able to wait until someone else can prove it is not safe and only then being forced to withdraw the product.
What also happens quite frequently is that when indeed the harmfulness of a supplement or cosmetic (the same rules apply) is proven, manufactorers withdraw the product, change the formula just slightly, and bring it back onto the market. Then the whole game starts all over again, until years later, science catches up with that product as well. Then they again change the formula a little, ...