Chemical Peels Compared: Glycolic, Salicylic, Jessner and TCA - A Complete Decision Guide

Updated 16 September 2026. Korean Plastic Surgery Research Desk.

Quick Answer

Question	Short answer
What determines the result	Depth of penetration, not the brand or programme name
Best first peel for acne-prone skin	Salicylic acid, because it is lipid-soluble and reaches sebaceous follicles
Best general starting point	Glycolic acid for dullness, rough texture and mild uneven pigment
For photodamage and stubborn pigment	TCA at medium depth, with materially higher risk
Main risk in deeper-toned skin	Post-inflammatory hyperpigmentation, which can outlast the original problem
Peels for melasma	Generally an adjunct, not a primary treatment; aggressive peeling can aggravate it
Before a full-face peel	Ask for a test area, especially with deeper skin tone
Three questions to ask	Which acid and what concentration, what depth is intended, how many days of visible peeling

Peel Depth Comparison

Agent	Working depth	Main target	Visible peeling	Key caution
Glycolic acid	Superficial (epidermis)	Dullness, rough texture, mild pigment	Light flaking, a few days	Time-dependent, not self-limiting; needs careful neutralisation
Salicylic acid	Superficial, follicle-penetrating	Comedonal and inflammatory acne, oily skin	Light, a few days	Avoided in salicylate sensitivity and pregnancy
Jessner's solution	Superficial to medium	Acne and pigmentation; primer before TCA	Sheeting over several days	Resorcinol sensitivity; ask which formulation is used
TCA	Medium (papillary dermis)	Photodamage, fine lines, stubborn pigment	Darkening then peeling, about a week	Meaningful risk of post-inflammatory hyperpigmentation

Chemical peels are classified by how deeply the acid penetrates: superficial peels such as glycolic and salicylic act within the epidermis, medium-depth peels such as Jessner and TCA reach the upper dermis, and depth, not brand, determines both the result and the risk.

In Korean clinics peels are often bundled into programmes with names that describe the marketing rather than the chemistry, which makes comparison difficult. Understanding the acid, its concentration, and its intended depth lets you judge whether what is being offered matches your concern. This guide compares the main peeling agents, explains which conditions each addresses, sets out why deeper-toned skin changes the calculation, and lists what to establish before your first session.

Depth Is the Variable That Matters

Peels work by controlled chemical injury. The body responds by shedding damaged layers and generating new tissue, which improves texture, pigment, and in deeper peels, fine lines. The deeper the injury, the greater the potential improvement and the greater the risk of scarring, prolonged redness, and pigment disturbance.

The three working depths

Superficial peels affect the epidermis and typically cause light flaking over a few days. Medium-depth peels reach the papillary dermis, with visible peeling over roughly a week. Deep peels reach further into the dermis, require careful medical supervision, and are used selectively, particularly in patients who pigment readily.

Glycolic Acid: The General-Purpose Superficial Peel

Glycolic acid is an alpha hydroxy acid with a small molecular size that loosens the bonds between surface keratinocytes. It is water-soluble and works mainly on the skin surface, making it a reasonable starting point for dullness, rough texture, and mild uneven pigmentation.

Depth depends on concentration, pH, and how long the acid is left on before neutralisation, which is why the same percentage can behave differently in two clinics. Because it is time-dependent rather than self-limiting, application requires attention. Expect mild stinging, transient redness, and light flaking. Results are typically incremental and accumulate over a series rather than appearing after one session, so a single treatment before an event is usually a poor use of it.

Salicylic Acid: Oil-Soluble and Suited to Acne

Salicylic acid is a beta hydroxy acid that is lipid-soluble, allowing it to penetrate sebaceous follicles rather than acting only on the surface. That property makes it the conventional choice for comedonal and inflammatory acne, oily skin, and enlarged-appearing pores.

It also has mild anti-inflammatory activity, which is useful in skin that reddens easily. Penetration is somewhat self-limiting, and a characteristic white crystalline frost appears as the solvent evaporates, which is expected rather than a sign of injury. It is generally avoided in patients with salicylate sensitivity and during pregnancy, both of which should be disclosed at consultation. For acne-prone Asian skin, it is frequently preferred over glycolic as a first peel.

Jessner's Solution: A Combination Approach

Jessner's solution combines salicylic acid, lactic acid, and resorcinol in an ethanol base. The combination allows each component to work at a lower individual concentration, and depth is controlled by the number of coats applied rather than by timing alone, which gives the operator more incremental control.

It is used both on its own for acne and pigmentation and as a preparatory layer before TCA, where it helps produce a more even penetration. Peeling is usually more pronounced than with a single superficial acid, often over several days with visible sheeting. Resorcinol carries its own sensitivity considerations, and modified formulations without it exist. Ask which version a clinic uses if you have a history of contact reactions.

TCA: Medium-Depth Work With Real Consequences

Trichloroacetic acid denatures proteins in the skin, producing a visible frost that guides the operator on depth. Concentration largely determines that depth, and in medium-depth ranges it addresses photodamage, fine lines, and stubborn pigmentation more effectively than superficial agents.

It is also where risk becomes material. Downtime typically involves several days of darkening followed by peeling, with redness persisting longer. In skin types prone to pigmentation, post-inflammatory hyperpigmentation is a recognised and reasonably common outcome, which is why priming the skin beforehand and strict sun avoidance afterwards are standard. TCA at high concentration applied to the whole face in deeply pigmented skin is a decision that warrants a specialist, not a technician.

Why Asian and Deeper-Toned Skin Changes the Plan

Skin with more active melanocytes responds to inflammation by producing pigment. This means the same peel that resolves cleanly in lighter skin can leave dark patches that take months to fade in deeper skin, occasionally outlasting the problem being treated.

Practical consequences are conservative depth, priming with agents such as topical tyrosinase inhibitors or retinoids where appropriate, test areas before full-face treatment, and disciplined photoprotection. For melasma specifically, peels are generally an adjunct rather than a primary treatment, because aggressive peeling can aggravate it. A clinic in Korea that proposes a deep peel for melasma without discussing this risk is not managing your skin type carefully.

How to Judge What a Clinic Is Offering

Ask three questions: which acid and what concentration, what depth is intended, and how many days of visible peeling to expect. A programme name alone answers none of these. Ask also what the plan is if pigmentation develops afterwards, since the answer reveals whether the clinic has anticipated the most likely adverse outcome.

Disclose isotretinoin use, recent laser or waxing, active cold sores, and any tendency to scar, all of which change candidacy or timing. For international patients, the schedule matters: if peeling is expected for a week, plan your travel and photographs accordingly rather than booking a peel two days before flying home.

Frequently Asked Questions

Which peel is best for acne scars?

Peels alone have limited effect on established atrophic scars. Focal high-concentration TCA applied precisely into narrow scars is one recognised technique, but broad peeling mainly improves surface texture and pigmentation rather than scar depth. Combination treatment is usually required.

How often can peels be repeated?

Superficial peels are commonly repeated at intervals of a few weeks in a series, while medium-depth peels are spaced considerably further apart to allow full healing. Repeating before the skin has recovered increases the risk of pigmentation without improving the result.

Can I combine a peel with laser treatment?

Combinations are used, but stacking two inflammatory treatments close together raises risk, particularly in pigment-prone skin. Sequencing should be planned deliberately by the treating clinician rather than assembled from separate packages.

Is at-home peeling a reasonable substitute?

Low-concentration home products can maintain results between clinic sessions. Higher-strength acids bought without supervision are a recognised source of chemical burns and pigmentary injury, and are not advisable, particularly on the face.

How long before I see a difference?

Superficial peels usually show gradual improvement across a series over weeks. Medium-depth peels show a more evident change once peeling completes and redness settles, though the final result on pigmentation may take longer to judge as the skin stabilises.

Choose the peel by the depth your concern requires and the risk your skin type can absorb, not by the name on the treatment menu. If you are planning treatment in Korea, ask for the agent, the concentration and the expected downtime in writing before booking. Team Medicals can help international patients compare dermatology clinics and clarify what a proposed peel programme actually involves.

Disclose Before Treatment

• Isotretinoin use, current or recent.

• Recent laser treatment or waxing on the area.

• Active cold sores or any herpes history.

• Any tendency to keloid or hypertrophic scarring.

• Pregnancy or breastfeeding.

• Previous pigmentation after a procedure.

Planning Around Travel

Peel type	Plan for
Superficial	Light flaking for a few days; a series spaced weeks apart
Medium depth	About a week of visible peeling, with redness persisting longer

If peeling is expected for a week, do not book a peel two days before flying home. Our guide to flying after cosmetic surgery covers scheduling, and our 15-point clinic vetting checklist covers verification.

Sources and References

• US National Library of Medicine. Literature on chemical peels and pigmentation risk in skin of colour.

• Korean Dermatological Association. Society information. Use to verify dermatology specialist certification.

• US National Library of Medicine. Literature on TCA concentration and peel depth.

This article is general information for international patients and is not a diagnosis or treatment recommendation.