Lactic Acid

Lactic acid is an alpha hydroxy acid, often fermentation-derived, used in cosmetic formulations. It exfoliates the skin's surface to smooth texture, promote a radiant look, and add humectant hydration in pH-controlled products.
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Ingredient Snapshot

Overview
An AHA that gently exfoliates for smoother, brighter-looking skin.
Category
Exfoliating, Brightening, Tone/Texture, Acne, Hyperpigmentation
Type
Exfoliant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Visibly refines rough patches and boosts luminosity for a fresher look. When balanced in formula, it can leave skin feeling dewier and more supple.

Uses In Skincare & Cosmetics

Found in AHA serums, exfoliating toners, masks, body lotions, and low-foam cleansers designed for periodic resurfacing.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Can sting or irritate and may increase photosensitivity, so introduce slowly and use daily sunscreen. Avoid use on compromised skin and be cautious when layering with other strong exfoliants.

Is Lactic Acid a Good Ingredient?

Rated Good because it's a well-studied AHA that smooths texture and adds surface hydration when used in pH-controlled formulas. It carries a moderate risk of irritation and increased sun sensitivity, though, which is what prevents a higher rating.

Products with Lactic Acid

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