Salicylic acid is a type of beta hydroxy acid (BHA) that is commonly used in skincare products. It is a gentle exfoliant that helps remove dead skin cells, unclog pores and reduce the appearance of acne. It also helps to reduce inflammation, stimulate collagen production and promote cell turnover, reducing the appearance of fine lines and wrinkles. It has a keratolytic action, softening and dissolving the keratin plugs that block the pores and causes acne. It can be drying, so it's important to use a moisturizer after use and wear sunscreen to avoid sun sensitivity.