Skin can be classified as: 1) oily, secreting excess sebum, 2) normal, secreting an average amount, or 3) dry, with below average sebum secretion. A reduction in sebum production is not the only mechanism for dryness; hydration due to the GAG content is very important, and high levels are desirable. People with oily skin tend to have medium-thick or thick skin.
Proper skin conditioning must be performed before a procedure to normalize skin so that it is not oily or excessively dry. Skin oiliness prevents the penetration of active ingredients in topical products and has a profound effect on Skin Health Restoration. Oiliness is the most common cause for treatment failure in acne, melasma, actinic keratoses, and other skin conditions.