Biotin- good/oral keratin- not so sure
I know that taking a good biotin supplement is great for your hair, skin and nails, but I can't find anything about taking hydrolyzed keratin orally. All I could find about hydrolyzed keratin is that it is made from sheep's wool and is used in hair products. There's 200mg of it in this supplement! The only negative thing I found about taking keratin orally is that too much protein can build up in your body, which can be dangerous. I suspect that the type of keratin in this supplement can't be used by your body anyway, because I read that it has to be Cynatine HNS, a soluble keratin protein. I'm no scientist, so I don't know! I can recommend a 10,000mcg biotin supplement, that's proven and safe, but I won't recommend a 200mg keratin one.
Rating: 3 stars