Lactic acid is an over-the-counter chemical exfoliant that comes from the fermentation of lactose — a carbohydrate found in milk. It's a popular ingredient in numerous skin care products nowadays. But ...

William Truswell, MD, FACS, operates his own cosmetic and reconstructive facial surgery practice. Dr. Truswell was the first in his area in Western Massachusetts to have an accredited private office ...

Medically reviewed by Deeptej Singh, MD Key Takeaways Lactic acid is an alpha hydroxy acid that is used on the skin to remove dead skin cells and help fade dark spots and soften fine lines.It comes in ...