The 9 Best Lactic Acid Serums in 2024: Tested and Reviewed

In short, exfoliation. In a bit more detail, "lactic acid clears away dead skin cells from the surface of the skin. This helps combat dullness and uneven skin tone, revealing smoother and brighter skin," says Mian.

It also plays well with others. "Lactic acid can be combined with other skincare ingredients to increase skin’s cell turnover, making skin appear smoother, decreasing appearance of fine lines and pores," explains dermatologist Kseniya Kobets.

That said, like any ingredient, lactic acid isn't completely without side effects or risks: "It is a gentle exfoliation; however, it may be drying for those with sensitive skin," says Mian.

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