The protein called gelatin, which is found in products like Jell-O, can be consumed to help strengthen hair and stimulate hair growth, according to WebMD. Gelatin is an animal protein that is also found in shampoos and face masks to help restore skin and hair.
People wanting to improve hair quality can consume gelatin in many forms, such as by eating Jell-O and marshmallows, or by adding a powdered form of the protein to teas, soups or yogurt. Gelatin is tasteless and the powdered form can also be used as a thickening agent, which may be desirable in homemade recipes. The powder can be purchased at a grocery store.