Beta Hydroxy Acids (BHAs) at concentrations of 2% or less, Beta Hydroxy Acids (BHAs) are are powerful anti-inflammatories, and are also efficacious in prevention and treatment of acne due to their pore cleansing and antibacterial functions. Beta Hydroxy Acids at concentrations of 3-60%, Beta Hydroxy Acids are used to combat the visible signs of aging, and as a chemical exfoliant for young or acne-prone skin.