Beta Hydroxy Acid = BHA. Unlike AHAs, BHAs can get deeper into the pores to remove dead skin cells and excess sebum. BHA is well known for its exfoliating and bacteria-fighting powers. BHA Salicylic acid is an organic compound that naturally occurs in willow bark, fruits or vegetables. It is suitable for acne-prone skin and targets deeper skin concerns since BHA penetrates deeper into the skin. BHA can bypass the oil that clogs pores and dissolve the mix of sebum & dead skin that leads to acne and reduce the size of enlarge pores stabilising its lining, which helps prevent acne.