What is lactic acid and who should use it?

Lactic acid is a gentle AHA derived from milk that exfoliates the skin's surface while also acting as a humectant to attract moisture. Its larger molecular size means it penetrates less deeply than glycolic acid, resulting in a milder exfoliation with less risk of irritation. It is an excellent choice for dry, sensitive, or beginner skin types, and is particularly effective for improving texture and mild hyperpigmentation.