Chemical Peels, Decoded: Glycolic, Salicylic, TCA and VI Peel

Chemical Peels, Decoded: Glycolic, Salicylic, TCA and VI Peel

Chemical peels are one of the oldest tricks in dermatology — and one of the most misunderstood. The word “peel” makes people picture raw, flaking skin and a week in hiding. In reality, peels range from a lunchtime glow-up to a more serious resurfacing, and the right one for you depends entirely on your skin and your goal. Here’s the plain-language guide to glycolic, salicylic, TCA, and the popular VI Peel — backed by the actual research.

A chemical peel applies a carefully chosen acid solution to the skin for a controlled amount of time. The acid loosens the bonds between skin cells and removes the outer, damaged layer — prompting the skin to shed it and replace it with smoother, fresher, more even-toned skin underneath. Deeper peels also stimulate collagen as the skin repairs.

The magic is in matching the type and strength of acid to the problem. That’s the whole game.

Glycolic acid (an AHA) is water-loving and works on the surface. It’s the classic brightening, smoothing, anti-dullness peel — great for tone, fine texture, and overall radiance.

Salicylic acid (a BHA) is oil-loving, so it gets into pores. That makes it the go-to for acne, congestion, blackheads, and oily skin.

TCA (trichloroacetic acid) is a more powerful resurfacing acid. At appropriate strengths it reaches deeper to tackle pigment, sun damage, and acne scars — with more correction but more downtime.

The VI Peel is a popular pre-mixed blend (it combines acids such as TCA, salicylic acid, and others). The blend approach lets a single peel address several concerns — tone, texture, mild pigment — with manageable recovery, which is why it’s a patient favorite.

The evidence for peels is broad and longstanding. For acne, a Cochrane systematic review evaluated alpha-hydroxy (fruit) acids and salicylic acid among topical acne treatments, supporting their role in care.¹ A randomized controlled trial of alpha- and beta-hydroxy acid peels found them effective for post-acne pigmentation.²

For pigment and melasma, glycolic acid peels — alone or combined with a TCA spot peel — improved melasma in a randomized controlled trial.³ A 2024 review in Dermatologic Clinics summarizes the role of chemical peels in treating melasma, while emphasizing careful patient selection.⁴

For texture and acne scarring, a randomized controlled trial compared microneedling with 35% glycolic acid peels versus microneedling with 15% TCA peels for atrophic acne scars, with both combinations improving scars.⁵ And for anti-aging, a randomized controlled study found glycolic acid peel sessions improved signs of photoaging.⁶

We use peels as a versatile, customizable tool. Lighter glycolic or blended peels are ideal for a brighter, smoother, more even complexion and a pre-event glow. Salicylic peels are our pick for acne-prone and oily skin. Stronger TCA-based work and the VI Peel come in for more stubborn pigment, sun damage, and texture. Peels also pair well with other treatments in a longer-term skin plan.

Which acid, what strength, how many sessions, and how to prep your skin are genuinely clinical decisions — and skin tone matters a great deal here. Used carelessly, peels (especially deeper ones) can cause irritation or, in darker skin tones, unwanted pigment changes. This is not something to guess at from a blog or an at-home kit. At Lumini, we assess your skin type and goals in person and choose a peel — and a plan — that’s both safe and effective for you.

Done correctly, peels are very safe, and downtime scales with depth: superficial peels may cause only mild redness and a day or two of light flaking, while medium-depth peels involve more visible peeling and recovery.⁴ Most people do a series of superficial peels (often spaced 2–4 weeks apart) for cumulative results, while a single medium peel delivers more in one go. Results last longest with sun protection and a maintenance plan — and avoiding sun before and after is essential to prevent pigment problems.

We offer a range of peels — including glycolic, salicylic, TCA, and the VI Peel — matched to your skin and goals. Pricing is personalized at your consultation, since it depends on the peel type and the number of sessions in your plan. Our team treats patients in English, Spanish, and Portuguese, serving Aventura, Sunny Isles, Bal Harbour, and North Miami Beach.

Which peel is right for me? It depends on your concern: glycolic for dullness and tone, salicylic for acne and oil, TCA or a VI Peel blend for pigment, sun damage, and texture. Your provider matches the acid to your skin at consultation.

Will my skin actually peel off? Light peels often cause only mild flaking; deeper peels involve more visible peeling over several days. The depth — and recovery — is chosen to fit your goal and your downtime tolerance.⁴

Do peels help acne? Yes — salicylic and AHA peels are supported for acne and post-acne marks in controlled studies and a Cochrane review.¹ ²

Are peels safe for darker skin tones? They can be, but skin tone strongly affects which acid and strength is safe — careful selection prevents pigment changes. This is why an in-person assessment matters.⁴

How many sessions will I need? Superficial peels usually work best in a short series spaced a few weeks apart; a single medium peel does more at once. Your plan is set at consultation.

1. Liu H, et al. Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne. Cochrane Database Syst Rev. 2020. PMID: 32356369.
2. Ravikumar B, et al. Efficacy of Alpha and Beta Hydroxy Acid Chemical Peels in Postacne Pigmentation: A Double Blinded, Randomized, Controlled Trial. J Clin Aesthet Dermatol. 2022. PMID: 35309278.
3. Garg S, et al. Comparative Efficacy of a 35% Glycolic Acid Peel Alone or in Combination With a 10% and 20% Trichloroacetic Acid Spot Peel for Melasma: A Randomized Control Trial. Dermatol Surg. 2019. PMID: 31464703.
4. Sarkar R, et al. Chemical Peels in Treatment of Melasma. Dermatol Clin. 2024. PMID: 37977681.
5. Dayal S, et al. Efficacy of Microneedling With 35% Glycolic Acid Peels Versus Microneedling With 15% Trichloroacetic Acid Peels in Treatment of Atrophic Acne Scars: A Randomized Controlled Trial. Dermatol Surg. 2022. PMID: 36342251.
6. Rouvrais C, et al. Antiaging efficacy of a retinaldehyde-based cream compared with glycolic acid peel sessions: A randomized controlled study. J Cosmet Dermatol. 2018. PMID: 30027612.

Medically reviewed by Dr. Thiago Queiroz, D.O., Medical Director, Lumini Medical Spa. Educational, not a substitute for an in-person consultation.