The slow beauty acid: How mandelic acid is changing the way we exfoliate

It was 1831 in a dimly lit German apothecary when pharmacist Ferdinand Ludwig Winckler heated amygdalin, extracted from bitter almond kernels and—almost accidentally— isolated what we now know as mandelic acid. Named after mandel, the German word for almond, the compound spent much of the next century in unglamorous roles: first documented in medical texts, then used as an antibacterial treatment for urinary tract infections. Long after, skincare recognised its unique temperament. 

Pioneers like Dr James E Fulton, the acne-focused innovator behind early clinical formulations, recognised what Winckler could never have imagined: this large-molecule AHA doesn’t rush. It glides. No dramatic redness, no “sandblasted” peel, just steady, polite cellular turnover that does the job without drama. 

I first stumbled across it in a Reddit thread—a user with melanin-rich skin swearing by 10% mandelic as a secret weapon everyone else overlooked. Dermatologists I spoke with echoed this assessment, noting that molecular size directly influences penetration depth, and slower penetration allows exfoliation to occur without overwhelming the skin’s inflammatory response.

CLINICAL APPEAL

“Its popularity comes from how gently it works with the skin rather than against it,” says Dr Geetika Mittal Gupta, celebrity dermatologist and Founder of Isaac Luxe, explaining mandelic acid’s ability to minimise irritation while delivering antibacterial benefits. 

Dr Chiranjiv Chhabra, Chief Dermatologist and Founder of Alive Wellness Clinic, tells me, “It is ideal for people with sensitive skin. Mandelic acid is partially oil-soluble, so it penetrates oily pores and regulates sebum,” she adds. She further adds, “People with darker skin tones also benefit, as it does not disrupt melanin production. Acne-prone skin and those with rosacea also benefit due to its oil-soluble and anti-inflammatory properties.”

This combination—gentle yet functional—has made mandelic acid increasingly relevant in dermatology where patient’s tolerance matters as much as visible improvement. It is also why brands focused on barrier health have embraced it. 

Deborah Kilgore, Global Director of Skin Care Knowledge at Paula’s Choice, explains that mandelic acid delivers resurfacing without the fallout many associate with exfoliation. In modern formulations, mandelic acid is no longer acting alone—it’s part of a thoughtful system designed for long-term use. “We pair it with slow-release lactic acid and calming, fermented antioxidants so exfoliation enhances the skin’s resilience rather than compromising it,” Kilgore says.

THE LIMITS OF GENTLENESS 

That same gentleness, however, also defines the ingredient’s limits. Dr Gupta notes that while mandelic acid excels in everyday routines, it cannot replace more intensive interventions. “It delivers steadier results with fewer setbacks. But for deep pigmentation, sun-damaged skin, or significant textural changes, stronger acids or clinic-based treatments tend to be more effective.”

Comparative studies reinforce this. A 2019 randomised study in the Journal of Cutaneous and Aesthetic Surgery compared peels for active acne and post-acne pigmentation, finding that glycolic acid delivered faster, deeper improvements in lesions while mandelic acid combinations were gentler but less aggressive. Another study on periorbital melanosis showed 30% lactic acid outperforming 30% mandelic in pigmentation reduction and patient satisfaction. Mandelic wins on tolerability; it rarely wins on velocity or intensity. 

Dr Chhabra echoes this caution, reinforcing that its strength lies in maintenance rather than correction. As with most acids, outcomes also depend heavily on how it is used. Layering, experts agree, requires restraint and patience. “You can use vitamin C in the morning and mandelic acid in the evening... alternate with retinoids,” advises Dr Chhabra. “It should not be layered with other exfoliating acids.” Dr Gupta warns: “Problems arise when exfoliants are stacked aggressively. Persistent burning, redness, or pigmentation are signs that the skin is overwhelmed.”

Yet experts see mandelic acid thriving in supportive roles. Dr Chhabra envisions it as “an effective maintenance and adjunct treatment for body acne, folliculitis, and post-inflammatory pigmentation.” Dr Gupta agrees: “Mandelic acid is perfect for long-term use—body care, ingrown hairs, folliculitis, and maintenance between stronger treatments.” Kilgore anticipates its expansion into “body care, underarms, chest, and back,” as well as microbiome-supportive hybrids and more sophisticated time-released delivery systems.

Lead image: Getty

Inside images: The brands

This article first appeared in Bazaar India's February 2026 print edition.

Also read: Daisy Edgar-Jones and Sophie Turner showcase spring's flattering "glazed pecan brunette" trend

Also read: Is peptide stacking the "miracle cure-all" trend for bouncier skin? Here's what you need to know