When it comes to chemical exfoliation, glycolic and salicylic acids often take center stage. But if you’re searching for a gentler approach to brightening and smoothing the skin, lactic acid serum deserves a closer look. In a recent feature published by Harper’s Bazaar (original article), Dr. Kiran Mian, board-certified dermatologist at Hudson Dermatology and Laser Surgery in New York, shared her expert insights on how to use lactic acid serums effectively and which products deliver visible results.
What Does a Lactic Acid Serum Do for the Skin?
“Lactic acid clears away dead skin cells from the surface of the skin,” explains Dr. Mian.
“This helps combat dullness and uneven skin tone, revealing smoother and brighter skin.” It also plays well with other ingredients. “Lactic acid serum can be combined with other skincare ingredients to increase skin’s cell turnover, making skin appear smoother, decreasing appearance of fine lines and pores.”
However, she also warns that even though it’s considered mild, those with sensitive skin should proceed with caution. “It may be drying for sensitive skin types,” she notes. That makes following up with a hydrating moisturizer essential.
Who Should Use a Lactic Acid Serum?
Lactic acid serums are a versatile addition to many skincare routines, especially for those with mild to moderate concerns. According to Dr. Kiran Mian, these serums are ideal for individuals who want to:
Improve overall skin texture
Minimize the appearance of enlarged pores
Fade hyperpigmentation and dark spots
Brighten dull or uneven skin tone
Gently stimulate collagen production over time
Because lactic acid is one of the gentler alpha hydroxy acids (AHAs), it offers visible results with less risk of irritation—making it suitable for most skin types, including sensitive skin.
How Often Should You Use a Lactic Acid Serum?
Both Dr. Mian and other dermatologists suggest easing lactic acid into your routine. “You should ensure the skin is not irritated or inflamed before starting,” advises Dr. Mian. Begin with a few nights a week and increase as tolerated. And don’t forget hydration: “Always follow with a moisturizer to replenish hydration,” she says.
Dr. Mian’s Top Recommended Lactic Acid Serums
Best All-Around: Sunday Riley Good Genes All-In-One AHA Lactic Acid Treatment
“Arguably the most famous lactic acid serum for a reason,” say beauty editors. Good Genes combines exfoliation with skin-plumping hydration and brightening properties. Users report smoother texture and clearer pores within days.
Best Multitasker: U Beauty Resurfacing Compound
Dr. Mian recommends this multitasking lactic acid serum that pairs lactic acid with retinol and vitamin C. “It’s great for those looking for a brighter complexion with fewer steps.”
Best for Acne-Prone Skin: Shani Darden Lactic Acid AHA Exfoliating Serum
Containing 9% lactic acid and gluconolactone, this formula helps with dark spots and clogged pores while minimizing irritation. A favorite among those with breakout-prone skin.
Best Gentle Option: Paula's Choice 6% Mandelic + 2% Lactic Acid Liquid Exfoliant
Ideal for sensitive skin, this blend of mandelic and lactic acid softens fine lines while maintaining a mild exfoliating effect. Dr. Mian approves of its low-irritation formulation and added hydrating benefits.
Best Pre-Treatment Toner: HydroPeptide Pre-Treatment Toner
Dr. Mian describes this toner as “gentle yet effective,” offering a hydrating layer of lactic acid exfoliation that can be layered into existing skincare routines.
The Bottom Line on Lactic Acid Serums
A well-formulated lactic acid serum is an accessible yet powerful skincare product with the ability to gently resurface the skin, making it smoother, brighter, and more even. Thanks to its compatibility with most skin types and its versatility in formulations, it’s a favorite among dermatologists like Dr. Mian.
Just remember: start slow, moisturize well, and choose a formulation suited to your skin’s needs. Whether you’re targeting dullness, fine lines, or uneven tone, a lactic acid serum might just be your new go-to. And if you need help with defining the needs of your skin for achieving your ideal glow, book a consultation with Dr. Kiran Mian below.
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