It increases cell turnover and helps eliminate accumulated dead skin cells on the epidermis — the top layer of the skin. When using lactic acid in 12% concentrations, the skin gets firmer and thicker. As a result, there is an overall smoother appearance and fewer fine lines and deep wrinkles.

Is it OK to use lactic acid everyday?

Normally, no, it's not recommended to use lactic acid products every day, but it depends on what type of lactic acid product you're using. If you are using a rinse-off product, like a cleanser with lactic acid, then every day use can be okay.

Can lactic acid ruin your skin?

It may even increase your risk for skin cancer. Lactic acid peels can also cause irritation, rash, and itchiness. These effects are usually mild and improve as your skin gets used to the product. If your side effects persist after the first few applications, discontinue use and see your doctor.