Multani mitti, better known as the Fuller’s earth is a clay substance that is hugely popular for its healing property against acne and blemishes. It is very rich in magnesium chloride which helps to reduce acne. Originally used as an absorbent in the wool industry this ingredient is now greatly used in many skin care products. You can use it as a cleanser, toner and most importantly as multani mitti facial packs, which are very popular.