GMC-Registered · UK skin cancer specialist
Dermatologist's quick take
- AHA (glycolic, lactic, mandelic) for surface texture and pigmentation
- BHA (salicylic) penetrates oil, ideal for acne and clogged pores
- PHA (gluconolactone, lactobionic) gentlest, suitable for sensitive skin
- Stay under 10% AHA / 2% BHA at home; anything stronger needs professional supervision
- TCA, phenol, and Jessner's peels are NEVER safe at home
I'm Dr. Iwasa. The market for at-home chemical peels has exploded — and so have the cases I see where someone has caused chemical burns, post-inflammatory hyperpigmentation, or barrier damage from products they bought without guidance. Used correctly, OTC peels are excellent. Used wrong, they can take 6–12 months to recover from.
This guide covers what's safe at home, what to avoid, and how to layer peels into a routine. Track changes objectively with a free AI skin analysis from ScanSkinAI.
The peel hierarchy
PHA (gentlest)
Gluconolactone, lactobionic. Larger molecule, slow penetration. Best for sensitive skin or first-time users.
AHA (surface)
Glycolic, lactic, mandelic. Targets pigmentation, dullness, fine lines. Use up to 10% at home.
BHA (oil-soluble)
Salicylic acid. Penetrates oil, ideal for acne and clogged pores. Up to 2% at home.
Combination peels
Many products mix AHA + BHA. Effective but more irritating — start once weekly.
Daily acids
Lower strength acid toners (5–7%) used 3–5x weekly often outperform weekly aggressive peels.
Never at home
TCA >10%, phenol, Jessner's, modified Hetter — these are dermatologist-only procedures.
Choose by concern
Dullness, surface pigmentation, fine lines
Glycolic acid 5–10% applied 1–2x weekly. For deeper pigmentation see hyperpigmentation treatments.
Acne, blackheads, oily skin
Salicylic acid 1–2% 2–3x weekly. Penetrates the lipid environment of follicles where comedones form. Pair with retinoid + BPO for complete acne control.
Sensitive, reactive, or rosacea-prone skin
PHA (gluconolactone) or mandelic acid 5% weekly. Both have larger molecules that penetrate slowly, minimising flushing and stinging.
Skin of colour
Mandelic acid or lactic acid 5–10% are safer than glycolic in Fitzpatrick IV–VI because they reduce post-inflammatory hyperpigmentation risk. Avoid TCA and phenol entirely without dermatologist supervision.
At-home peel protocol
- Patch test on inner forearm for 3 nights before face use
- Apply to clean, dry skin in evening only — never AM (photosensitivity)
- Avoid eye area, lips, and any active breakout or wound
- Start with shortest contact time (1–3 minutes if rinse-off)
- Build to recommended frequency over 4 weeks
- Daily SPF 30+ — non-negotiable when using any acid
When to combine, when to alternate
Same routine OK: PHA + niacinamide; lactic + hyaluronic acid; salicylic + benzoyl peroxide (for acne).
Alternate nights: Any AHA/BHA with retinoids. Stacking these triples irritation with no extra benefit.
Never combine: Multiple chemical peels in same routine; peels with strong vitamin C (L-ascorbic at 15%+); peels within 5 days of professional treatment.
Stop and see a dermatologist if:
- White frosting, blistering, or weeping during/after peel — this is a chemical burn
- Persistent burning >30 seconds after rinsing
- Dark patches developing 2–4 weeks post-peel (post-inflammatory hyperpigmentation)
- Sustained redness, swelling, or skin shedding lasting >5 days
- Any peel intended to "remove" a mole or skin lesion — never do this
When to upgrade to professional peels
At-home peels are a maintenance tool. Real transformation — for melasma, deep acne scarring, significant photoageing — requires professional TCA peels (15–35%), Jessner's, or laser resurfacing. Home use of these agents causes the worst dermatology emergencies I see. Save for in-clinic.
For routine layering with other actives, see retinol complete guide and niacinamide vs vitamin C vs HA.
Track your peel results objectively
Free AI skin analysis scores texture, redness and pigmentation week by week.
Frequently Asked Questions
Weekly is plenty for most people. Daily low-strength acids (toner pads) are gentler and often more effective long-term than aggressive weekly peels.
Lactic is gentler and more hydrating; glycolic penetrates deeper and works faster on pigmentation. Mandelic acid is the gentlest option for sensitive or darker skin.
No. Pick one. Acids and retinoids on the same night dramatically increase irritation and barrier damage. Alternate them on different evenings.
Stop and rinse immediately. White frosting indicates protein coagulation — you've gone too deep. This is acceptable in clinical TCA peels, never at home.
More controlled dosing and contact time. Slightly more expensive per use. Either works; consistency matters more than format.
Surface brightness: 1–2 weeks. Texture and pigmentation: 6–12 weeks. Deeper acne scars or melasma require professional peels — at-home will not achieve those results.
Dr. Celina Kazumi Iwasa
VerifiedGMC-Registered · UK Hospital + Private Practice · Skin Cancer Screening Specialist
Dr. Iwasa is a GMC-registered dermatologist working across UK hospital and private practice settings. She specialises in skin cancer screening, mole assessment and dermoscopy, with a focus on UK and European patients across Fitzpatrick I–IV skin types.