Glycolic acid is one of skincare’s hardest-working ingredients, known for smoothing texture, boosting hydration, and revealing radiant, healthy-looking skin. Dermatologist Sandra Lee, MD (aka Dr. Pimple Popper), often recommends this alpha hydroxy acid for its versatility and visible results, as it tackles everything from acne to dullness to early signs of aging. Here are her top reasons why glycolic acid deserves a place in your routine.

First off: what is glycolic acid?

Glycolic acid is an alpha hydroxy acid (AHA) — a type of chemical exfoliant naturally derived from sugar cane. Because its molecules are so small, it penetrates the upper layers of skin to loosen and dissolve the bonds that hold dead cells together. The result is smoother texture, improved tone, and a brighter, more even-looking complexion.

“When patients ask for one ingredient that can make a noticeable difference fast," notes Dr. Lee, "glycolic acid is always near the top of my list.” Bonus: it’s suitable for most skin types, including those prone to keratosis pilaris.

#1 It’s exfoliating

Regular exfoliation helps remove dead skin cells that can dull your glow and clog pores. Glycolic acid gently clears away debris and excess oil (aka sebum), revealing smoother, softer skin in one step.

Dr. Pimple Popper tip: "Over-exfoliating can undo the benefits, so start slowly — two or three times weekly, then increase as your skin adjusts."

Try: SLMD Glycolic Acid Body Scrub, combining physical and chemical exfoliants to smooth and brighten without stripping moisture.

#2 It’s gentle

Physical scrubs can be too harsh for delicate facial skin. Glycolic acid works without friction, breaking down dull surface buildup with minimal irritation — a smart choice for many sensitive or acne-prone complexions.

#3 It’s versatile

From acne to uneven texture to early lines, glycolic acid targets multiple concerns at once. It also helps keep body skin clear by loosening buildup that can contribute to ingrown hairs and rough patches.

Try: SLMD AHA/BHA Swipes to remove pore-clogging impurities and sweep away dead, dry skin.

#4 It’s well-tolerated

Glycolic acid works well for most skin types — just pace your usage. Oily or acne-prone skin often tolerates more frequent use than dry or sensitive skin. Patch test first, then build gradually from one to two times weekly toward every other day or daily as tolerated.

Try: SLMD Body Smoothing System, a scrub-and-lotion duo that exfoliates and hydrates for softer, bump-free skin.

#5 It’s hydrating

Glycolic acid is a humectant, which means it helps attract water into the skin. By clearing away dead skin cells, it also helps your moisturizer absorb more effectively — especially useful in colder, low-humidity months when skin can feel dry or itchy.

“People assume acids are drying, but glycolic acid actually helps your moisturizer work better," explains Dr. Lee. "It's really beneficial for the skin barrier in winter.”

Try: SLMD Glycolic Acid Body Lotion, with soothing aloe and niacinamide to smooth and deeply moisturize dry, rough skin.

#6 It boosts collagen

With regular use, glycolic acid helps support collagen renewal over time. That process improves firmness and refines texture for healthier-looking, more resilient skin — one reason it’s a cornerstone of well-aging skincare.