Generally there are tow types of exfoliators. The first one are chemical exfoliatorswhich remove dull and dead skin by using enzymes or acids, which break down the biochemical bonds holding dead skin cells together. Thereby making it possible to remove them. The second are physical exfoliants, which, when rubbed over your skin, remove dead skin cells. The rubbing physically loosens the dean skin cells and smooths your skin. Benefits of walnut shell: If we wanna list benefits of gently exfoliating skin with ingredients containing walnut shell powder, we can name below items Smooth and even tone of skin Aanti-acne and an excess oil build up in skin. Helping skin feel smoother and softer. Removing dead and dry skin cells, giving healthier skin. Controlling the amount of pressure and how frequently you exfoliate your skin. Just like brushing teeth.