AHA vs BHA — What’s the Difference? AHA (Alpha Hydroxy Acid) • Works on the skin surface • Exfoliates dead skin cells • Makes skin smoother and brighter • Best for dry or sensitive skin BHA (Beta Hydroxy Acid) • Penetrates deep into pores • Unclogs pores and reduces oil • Calms inflammation • Best for oily or acne-prone skin Choose based on your skin type | Dr Lim Ing Kien