Dermal Therapy™ nourishing formula helps relieve severely dry, rough, problem skin with Urea. Urea is an important part of your skin's natural moisturizing system and is found in healthy young skin. Urea causes skin cells deep below the surface to attract, absorb and hold moisture better. Dermal Therapy also includes alpha hydroxy acids which help displace old dry skin and reveal new skin which is more elastic. Dermal Therapy contains silk protein to improve skin tone and lustre, giving skin a silky, smooth, non greasy feel. It penetrates deeply into the skin to leave skin feeling silky smooth all over.