Anti-acne

Ingredients with anti-acne function help to reduce the appearance of skin prone to rashes. They usually work in several directions at once.: They help to cleanse the pores of excess sebum and keratinized cells, reduce the number of bacteria associated with inflammatory elements, and reduce the severity of redness. According to the American Academy of Dermatology, acne develops when pores become clogged with sebum and dead cells, and among the common external ingredients for such skin are benzoyl peroxide, salicylic acid and azelaic acid. (aad.org)

In cosmetic and therapeutic care, such substances primarily affect the skin of the face, back and chest, where comedones and inflammations appear more often. They do not improve hair and are almost not necessary for the texture of the product as such; their main task is to make the formula useful for oily and problematic skin. Typical examples are salicylic acid, which exfoliates and helps to open clogged pores, and benzoyl peroxide, known as one of the most common and effective anti-acne ingredients. The American Academy of Dermatology notes that salicylic acid is especially useful for black and white spots, and benzoyl peroxide is often used for mild inflammatory rashes. (aad.org)

It is important to understand that such ingredients can often dry out the skin and cause irritation, so they are usually combined with mild cleansing and non-comedogenic moisturizing. The FDA indicates that salicylic acid is widely used in cosmetics as a BHA exfoliant, and over-the–counter external acne products in the United States have typical operating concentrations: 2.5–10% for benzoyl peroxide, 0.5-2% for salicylic acid. This means that the function is not aimed at masking imperfections, but at actually affecting the causes of clogged pores and inflammation. (fda.gov)