Spoiled milk probably sounds like the last thing you want to put on your face, right? Well, it turns out it’s actually pretty beneficial. Yet another addition to the bizarre (yet effective) skincare ingredient canon, lactic acid—a natural exfoliating acid found in rotten milk—is actually a mild Alpha Hydroxy Acid (AHA) that improves texture, nixes hyperpigmentation and scars, and soften the appearance of fine lines. Unlike many members in the AHA family, lactic acid is a much more gentle agent, allowing you to reap the unparalleled anti-aging benefits you’ll get from, say, a glycolic acid, but with much more gradual results and therefore, less irritation, peeling, and redness.
The best part is that you don’t have to douse your face in decaying milk to take advantage of the acid’s substantial laundry list of complexion-enhancing properties—I mean, that would be ridiculous; not to mention downright gag-worthy. Fortunately, savvy skincare brands have taken note of this under-the-radar acid’s multifaceted beauty virtues. Aside from exfoliating away dead skin cells and accelerating cell turnover exponentially, lactic acid also helps kill breakout-inducing bacteria, helping you maintain clear skin. It also helps improve skin’s elasticity with continuous use, and because it sloughs away impurities from the dermis, it also helps your subsequent skincare products absorb better (read: work better). Ready to add some sour-milk-spiked skincare to your current beauty lineup? If so, scroll through below to check out some of our favorite formulas to try for yourself.
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