BHA (Beta Hydroxy Acid) (See Salicylic Acid) is primarily used for pore clearing, acne, blackheads, anti-inflammatory. The mechanism: Oil-soluble — penetrates into pores; dissolves sebum and dead cells lining pores.
Oil-soluble — penetrates into pores; dissolves sebum and dead cells lining pores. This mechanism is consistent across properly formulated products, which means the real variable is concentration and delivery system.
Typical working concentration is 0.5–2%. Best suited to oily, acne-prone, combination skin. Primary applications: pore clearing, acne, blackheads, anti-inflammatory.
Works well with: Niacinamide, hyaluronic acid. Avoid combining with: Retinol (same step), multiple acids simultaneously.
Primarily refers to salicylic acid; also includes betaine salicylate.