While some skincare ingredients enjoy fleeting viral fame, others earn their permanent place in medicine cabinets through proven, consistent results. Glycolic acid, a dermatologist-favourite for decades, firmly belongs to the latter group. This potent yet gentle chemical exfoliant works in harmony with the skin's biology to address a surprising range of common body concerns that often share a root cause: the buildup of dead skin cells and keratin.
Unlocking the Versatility of Glycolic Acid
Unlike trendy ingredients that fade away, glycolic acid has maintained dermatological trust for years. Its small molecular structure allows it to penetrate effectively, dissolving the bonds between dead skin cells and promoting a healthier, more balanced skin environment. As its popularity surges online, many of its most practical applications for the body remain underutilised. Dr. Neera Nathan, a Harvard-trained dermatologist and skin-cancer surgeon, shares five expert hacks to make this "liquid gold" work harder for you.
1. Combatting Stubborn Back Acne
The skin on the back is thicker and has larger pores than facial skin. This makes it more prone to clogging from sweat, sunscreen residue, and friction from clothing. Glycolic acid breaks this cycle by dissolving deep-seated pore buildup, which helps prevent new breakouts. Simultaneously, it works to gradually fade the dark spots left by old acne. Dr. Nathan emphasises that consistent daily use can smooth the skin's surface and prevent the return of keratin plugs.
2. Brightening Dark Elbows and Knees
Areas like elbows and knees naturally develop roughness and hyperpigmentation due to constant folding, rubbing, and protective thickening. Harsh scrubbing can often worsen the darkness. Dr. Nathan recommends applying glycolic acid to clean, dry skin in these areas daily. It works by breaking apart dead skin layers before they compact, leading to a gradual evening of skin tone. When followed with a basic moisturiser, the skin remains supple and resists re-thickening, making the area appear lighter simply because the surface becomes uniform.
3. Smoothing Keratosis Pilaris (KP)
Those tiny, rough bumps on arms and thighs, known as keratosis pilaris, are caused by excess keratin trapping hair follicles. Glycolic acid effectively loosens this keratin, allowing the bumps to smooth out. It also addresses the accompanying dryness and flakiness. To prevent irritation while keeping keratin from re-accumulating, Dr. Nathan suggests using it two to three times per week.
4. Preventing Ingrown Hairs
Ingrown hairs occur when dead skin cells block the follicle opening, forcing the hair to curl and grow inward. Glycolic acid helps by clearing this entrance before the hair gets trapped. This makes it particularly beneficial for individuals who shave or wax regularly. With consistent application, the skin around each follicle becomes more flexible, allowing new hair to grow outward correctly.
5. Reviving Calloused and Odorous Feet
Feet accumulate dense layers of dead skin that trap sweat and bacteria, leading to persistent odour even after washing. Daily use of glycolic acid softens this thickened stratum corneum, allowing it to shed normally instead of forming a sealed, sweaty surface. As calluses thin, the skin breathes better, retains less moisture, and harbours fewer bacteria, addressing the core cause of the problem.
Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Skincare actives like glycolic acid may not suit everyone. Always perform a patch test and consult a dermatologist before introducing new products, especially if you have sensitive skin, existing conditions, or are on prescription treatments.
