Interestingly, Hyaluronicacid is mostly good for the joints, as it acts as a lubricant. Sobasically, its function in the body is to keep the joints lubricated,not allowing the bones to rub against each other. Also, it hascertain anti-inflammatory properties. The only benefit I see that itcan give in cosmetics, is to be a good moisturizer for the skin.Other than that, I don't see how it can help with hair or skinquality. You can get it in N2Joint RX for a fraction of the pricethese cosmetic products usually have.