Anti-Acne, Exfoliant, Preservative, Skin-Soothing, Whitening

Best
BHA (BETA HYDROXY ACID)

BHA is an acronym for beta hydroxy acid, which is more commonly known as salicylic acid, an ingredient that has multiple benefits for numerous skin types and concerns.
Note that BHA is the structural name for salicylic acid and is completely unrelated to the preservative ingredient BHA (butylated hydroxyanisole).