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 ...

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Putting acid on your face might sound like a recipe for disastrous stinging, burning, and peeling—a la Samantha’s lobster-red face in that unforgettable episode of Sex and the City. Lactic acid for ...

Lactic acid. Also know as the “burn” you feel on that last rep or final sprint, most athletes see it as a workout’s worst enemy, the cause of muscle soreness and fatigue. But what if everything you ...