Not All Chemical Peels Are Created Equal
Walk into any skincare aisle and you'll find peels with glycolic acid, salicylic acid, TCA, lactic acid — and it can be overwhelming. Each acid works differently, targets different skin concerns, and comes in different strengths. Choosing the wrong one won't just give you underwhelming results; it can cause irritation or damage your skin barrier.
This guide breaks down the three most popular chemical peel acids — TCA, glycolic, and salicylic — so you can choose with confidence.
The Quick Comparison
| Acid | Type | Best For | Penetration Depth | Downtime |
|---|---|---|---|---|
| Glycolic Acid | AHA | Dullness, fine lines, uneven texture | Superficial | Minimal (1–3 days) |
| Salicylic Acid | BHA | Acne, oily skin, clogged pores | Superficial–medium | Minimal (1–3 days) |
| TCA | Non-AHA/BHA | Pigmentation, deep wrinkles, scarring | Medium–deep | Moderate (5–10 days) |
Glycolic Acid Peels: The All-Rounder
Glycolic acid is an alpha-hydroxy acid (AHA) derived from sugarcane. It has the smallest molecular size of all AHAs, which means it penetrates the skin efficiently and delivers noticeable results even at lower concentrations.
Best for:
- Dull, lackluster skin
- Fine lines and early signs of aging
- Uneven skin tone and mild hyperpigmentation
- Rough or bumpy texture
How it works:
Glycolic acid dissolves the bonds between dead skin cells, accelerating cell turnover and revealing fresher skin underneath. It also stimulates collagen production with regular use.
Who should use it:
Glycolic is a great starting point for peel beginners. It's effective, well-studied, and available in a wide range of concentrations (10%–70%). Normal, dry, and combination skin types tend to respond well.
Who should be cautious:
Sensitive skin types may find glycolic too stimulating. If you're new to acids, start with a lower concentration (10–20%) and work up gradually.
Salicylic Acid Peels: The Acne Fighter
Salicylic acid is a beta-hydroxy acid (BHA) — and unlike AHAs, it's oil-soluble. This is the key difference: salicylic acid can penetrate into the pore lining, making it uniquely effective for oily and acne-prone skin.
Best for:
- Active acne and breakouts
- Oily or congested skin
- Blackheads and whiteheads
- Enlarged pores
- Mild post-acne marks
How it works:
Salicylic acid exfoliates inside the pore, dissolving the sebum and debris that cause congestion. It also has anti-inflammatory properties, which helps calm active breakouts.
Who should use it:
Oily, acne-prone, and combination skin types. Salicylic is also a good option for those who find glycolic too irritating, as it tends to be gentler on the surface of the skin.
Who should be cautious:
Those with aspirin sensitivities should avoid salicylic acid. Dry or mature skin types may find it too drying without proper hydration support.
TCA Peels: The Results-Driven Option
Trichloroacetic acid (TCA) is a medium-to-deep peel that works differently from AHAs and BHAs. It's not an exfoliating acid in the traditional sense — instead, it causes a controlled injury to the skin, triggering a significant healing and regeneration response.
Best for:
- Moderate-to-deep wrinkles and fine lines
- Significant hyperpigmentation and melasma
- Acne scarring and textural irregularities
- Sun damage
- Skin laxity
How it works:
TCA penetrates deeper into the dermis than AHAs or BHAs, causing the outer layers of skin to frost and eventually shed. The skin that regenerates is smoother, firmer, and more even in tone.
Who should use it:
Those with more advanced skin concerns — deeper wrinkles, significant scarring, or stubborn pigmentation — who are comfortable with a recovery period. TCA is best for experienced peel users or those who have already worked through lighter peels.
Who should be cautious:
TCA is not recommended for beginners. Darker skin tones should use TCA with caution and at lower concentrations, as there is a higher risk of post-inflammatory hyperpigmentation. Always patch test.
How to Choose the Right Peel for Your Skin Concern
- Dullness or uneven texture → Start with glycolic acid (20–30%)
- Acne or oily/congested skin → Salicylic acid peel
- Fine lines and early aging → Glycolic acid or low-% TCA
- Stubborn pigmentation or melasma → TCA (with caution)
- Acne scarring → TCA or a combination peel
- Sensitive skin → Lactic acid or low-% glycolic as a gentler entry point
Can You Combine Acids?
Some professional peels combine acids for enhanced results — for example, a Jessner's peel combines salicylic acid, lactic acid, and resorcinol. However, at home, it's best to use one acid at a time and master your skin's response before layering treatments.
The Golden Rule: Start Low, Go Slow
Regardless of which acid you choose, always start with the lowest effective concentration, follow the instructions carefully, and prioritize aftercare. A well-executed light peel done consistently will outperform an aggressive peel done incorrectly every time.
Ready to find your match? Explore our full range of professional-grade chemical peels and find the right acid and strength for your skin goals.
