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After all, this is legitimate science.
Collagen supplements have been touted as miracle products, andtheir effectiveness has been called into question before.

What is collagen, though?
It can even regenerate your follicles!
But is biotin a better supplement?

One is better for the skin than hair, but which is it?
Moreover, they’re water-soluble, so your body doesn’t store them.
It’s also said to stimulate the growth of both nails and hair.
It does this through promoting keratin, a protein common in nails and hair, per Vegamour.
This fortification of your nails and hair can help protect them from future damage, too.
The best part, though, is that they can be used in conjunction with one another.