It is applied to the skin in various strength ranging from 20-70% for varying time frames depending on the desired result and skin response. It loosens the thickened surface layers that appear as dry, rough, scaly skin and stimulates the production of collagen in the deeper layers. As the uppermost layers are sloughed away, a smoother textured and healthier skin is reveled. Glycolic peels are used to treat mild sun damage, pigmentation loss of elasticity.