How does nutrition affect hair and why is protein important in your diet?

this is for a cosmetology report on hair care. I need to report on how nutrition affects hair and why protein is important in your diet.

what u put into your body will show on the outside, for instance using drugs eventually show on the outside, and the saqme goes for food, drinking more water makes your skin have a healthier glow and helps get rid of peoples andmakes your urine less yellow, nutrition is good for your hair because as it grows it will have all those vitamins and what not, protein is good for your hair because it makes it stronger, you know, the same goes for building muscle eat lots of protein and the same goes for the hair!!!!! i take hair skin and nail vitamins and my hair is a lot stonger and healthier, i am able to keep the hair i grow without it breaking off!!!!!

Hairstyles & Hair Care : Nutrition for Healthy Hair