I started using some prenatal vitamins 2 months ago because my cousin recommended them. I noticed that my nails were growing so I began to investigate what was in the vitamins I was taking.
I asked my dermatologist and she said it was the biotin that was giving them the strength. I recently popped off one of my artificial nails expected a weak, undernurished nail, but to my surprise I found a beautiful, long and healthy nail. That was with wearing arylics for 2 1/2 months too!! I take biotin its purest form and this can be purchased at any vitamin store!!)