Methyl and propylparaben aren't good things to put in your body. If you can't read or pronounce it well, don't recognize it right off, then it's probably not good.
Biotin or lack of it, I've read somewhere, has something to do with the hair getting gray.
Hey, don't we know what's put on the skin gets absorbed into the body? I think that has to be true, for the most part.