The Complete Guide to Skin Peeling Agents

Last updated: 9 August 2026

From superficial to deep peels, understanding peel agents is essential. Compare glycolic, salicylic, TCA, Jessner, and phenol peels with their indications, depth, and recovery profiles.

The main peeling agents

Chemical peels are grouped by the acid used and the depth it reaches. Depth determines what a peel can achieve, how much recovery it involves, and how much risk it carries.

• Alpha hydroxy acids (glycolic, lactic, mandelic) — water-soluble, superficial. Glycolic has the smallest molecule and penetrates most readily; lactic and mandelic are gentler and often chosen for sensitive or darker skin.
• Beta hydroxy acid (salicylic) — oil-soluble, so it penetrates sebum and is commonly used for congestion and acne.
• Trichloroacetic acid (TCA) — reaches the upper dermis at medium depth. Used for pigmentation, fine lines and some scarring, with several days of visible peeling.
• Phenol — deep. Substantial results, substantial recovery, and real risks including cardiac effects from systemic absorption. A medical procedure requiring monitoring.
• Combination formulations (for example Jessner’s) — layered agents used to control depth more predictably than a single strong acid.

Choosing depth

Deeper is not better. Depth should follow the concern: surface dullness and congestion respond to superficial peels; pigmentation and fine lines usually need medium depth; deep peels are reserved for significant photodamage and carry permanent pigment change as an expected outcome rather than a rare complication.

Skin tone is the main safety variable

Higher Fitzpatrick skin types carry a materially greater risk of post-inflammatory hyperpigmentation, and deeper peels are generally avoided. Priming the skin beforehand and rigorous sun protection afterwards are part of the treatment, not optional extras.

Risks

Expected effects are redness, stinging, dryness and peeling. Recognised complications include post-inflammatory hyperpigmentation, permanent lightening with deeper peels, scarring, infection including reactivation of cold sores, and prolonged redness.

Peels are generally avoided in pregnancy, over active skin infection or eczema, and in people taking or recently finished with oral isotretinoin.

General information only, not medical advice. Whether any treatment is appropriate depends on an individual assessment by a qualified clinician.