Years ago i found a book in the library called "Eat Yourself Beautiful" by Liz Earl. In that she describes millet as being a very valuable hair and skin food, apparently it also is a vegan source of all 8 essential amino acids which would i assume be usefull for hair and skin health.
I do keep meaning to try adding this to my diet but never quite get around to it. In the book i mentioned there is a recipe for something called millet mash, which might be an idea to try.
BTW most people seem to recognise millet as bird food.....for those interested in what it is