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Lactic Acid: Ingredient Decoder

Pop quiz: What do your muscles, sour milk, and pickles have in common? Answer: they’re all sources of lactic acid. As you may know, your body makes lactic acid as your muscles burn energy during grueling gym workouts, and it’s also a product of food fermentation. This naturally occurring ingredient might be the last thing you think to put on your skin, but think again. Lactic acid is actually a great dual exfoliator and moisturizer, and rumor has it that Cleopatra liked to bathe in sour milk to keep her complexion smooth. But before you run to check the expiration date on your gallon of 2%, take a minute to learn how lactic acid really works. Read on to find out how to incorporate lactic acid into your skincare regime!

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