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Lactic Acid is a type of alpha-hydroxy acid (AHA) and an exfoliant that you can use on all skin types. It is gentler than many other exfoliants and has a large molecule structure, which means it is very gentle on the skin. Best of all, the results are instant so as soon as you use it, you’ll notice an immediate difference. Indeed, this exfoliant can also be used for a variety of skin problems, including dull-looking skin and acne, to name a few. The Ordinary’s Lactic Acid 5% + HA serum is one of the best serums offered by the brand. In this article, we look at how to use The Ordinary Lactic Acid, its benefits, how to dilute it, and more.