Which type of acid is primarily used in a BHA peel?

A BHA peel primarily utilizes salicylic acid due to its unique characteristics that make it effective for certain skin types and conditions. Salicylic acid is oil-soluble, allowing it to penetrate into the pores and exfoliate the skin from within. This ability makes it particularly beneficial for individuals with oily and acne-prone skin, as it can help to unclog pores, reduce inflammation, and promote clearer skin.

While tartaric acid, glycolic acid, and lactic acid are all AHA (alpha hydroxy acid) types and have their own benefits—such as improving skin texture and hydration—none have the same properties as salicylic acid in terms of penetrating oil and treating acne. This specific action of salicylic acid is fundamental in its application for effective BHA peels, targeting issues like blackheads, whiteheads, and overall skin clarity.