Keratolytic

Ingredients with this function help to soften and loosen the bonds between keratinized cells on the surface of the skin, making it easier to remove excess stratum corneum and making the skin smoother and smoother. In cosmetics, this effect is especially appreciated in products for oily, problematic, and pore-clogged skin: salicylic acid is known to be a keratolytic agent, and dermatological sources note that it helps exfoliate and cleanse pores, which is why it is often used for comedones and acne. Similar components can also be used in formulas for roughened areas of the skin, such as feet, elbows or knees, where it is necessary to reduce the severity of roughness and layers of horny scales. (medlineplus.gov)

In the finished product, this function primarily affects the renewal of the skin surface and a softer texture after regular use, but not so much on the consistency of the formula itself. Typical examples of ingredients are Salicylic Acid and Urea: the former is more commonly found in cleansers, lotions, and anti—rash products, while urea is especially popular in creams for dry, dense, and roughened skin, where it helps soften the stratum corneum. When using products with acids, it is important to consider the risk of irritation and hypersensitivity of the skin; the FDA specifically indicates that cosmetics with BHA, including salicylic acid, should be discontinued in case of irritation, and also requires attention to sun protection. (fda.gov)