7. Last but not least, you can take Biotin and
Vitamin D to improve hair, skin, and nails.
Vitamin D, I suggest trying to get bloodwork done to see if you're insufficient. IF you are, take 2-4 thousand i.u of it. Don't get a multi vitamin. It has a lotta crap in there that you dont need and not enough of the stuff you do. Biotin is GREAT for hair and nails- it's the main component of the hair protein! Also, a diet rich in amino fatty acids, like salmon, walnuts, avacado, etc.