There is no “perfect” chemical exfoliant for everyone. Each skin type has specific needs that different exfoliants can meet.  Some of the most common chemical exfoliants and their best uses include: *Salicylic acid – Great for oily, acne-prone skin types. It penetrates pores, unclogging them and reducing inflammation.  *Lactic acid – Suitable for dry, sensitive skin. It gently exfoliates while offering some hydration as well.  *Glycolic acid – Good for dry and normal skin types. It improves hyperpigmentation, fine lines, and overall skin texture.  *Mandelic acid – Particularly good for sensitive skin and darker skin tones. It is gentle on the skin and won’t worsen dark spots or hyperpigmentation. Other AHAs can actually worsen hyperpigmentation on darker skin tones!