Superficial peels loosen the dead surface layer only, work over a series and cost you almost no downtime. Medium peels reach through the epidermis and visibly shed for about a week. Deep peels are a medical procedure. For congestion and texture, the first level is almost always enough.
The word peel covers wildly different things, and that is where the misplaced expectations come from. An enzyme peel in a salon and a TCA peel in a clinic share a name but share neither their effect nor their risk. The one measure that sorts them is depth.
So this article organises the treatments by how deep they work rather than by which acid is in the bottle. Once you can tell the three levels apart, you can see immediately whether an offer matches what you actually want — and whether the quoted price is plausible at all.
1. The three levels and what each one does
Superficial peels loosen the bonds between the dead cells of the surface layer. That covers enzyme peels, mandelic acid, lactic acid, glycolic acid at cosmetic strengths and salicylic acid. Skin looks smoother and more even afterwards, pores read finer, and the products you use at home penetrate better. Visible flaking is often absent altogether, sometimes a little peeling around the nose and chin.
Medium peels reach through the epidermis to the boundary with the dermis. Typical agents are trichloroacetic acid at higher concentrations or combinations such as a Jessner solution. Something different happens here: the upper layer is deliberately injured and rebuilds itself. That can shift pigmentation and fine lines far more than any superficial treatment — at the cost of genuine downtime with redness, crusting and sheet-like shedding.
Deep peels using phenol work into the dermis. They are performed as a medical procedure, frequently with cardiac and circulatory monitoring, because the agent is absorbed through the skin. Healing takes weeks, the result lasts years. This is not a beauty appointment but a procedure with the preparation and aftercare to match.
The overwhelming majority of concerns — congestion, dullness, uneven texture, mild pigmentation — belong to level one. It asks for repetition instead of downtime, and for most people that is the better trade.
It is not the acid that decides, it is the depth. Everything else is labelling.
2. Which acid suits which skin
Within the superficial level the acids differ substantially, and the choice is not a matter of taste.
Salicylic acid is oil soluble and therefore gets inside the pore. It is the obvious pick for blackheads, congestion and oily skin. Glycolic acid has the smallest molecule of the fruit acids, works quickly to match, and is used for texture, dullness and fine lines. Lactic acid is milder and holds water in the skin as well, which makes it comfortable on dry types. Mandelic acid has the largest molecule, penetrates slowly and is consequently the gentlest option — the usual choice for sensitive skin and for deeper skin tones, because the risk of pigmentation afterwards is lower.
Enzyme peels work without acid at all. Enzymes from papaya or pineapple break down the protein bonds between surface cells. They are the gentlest option available and the right one for rosacea, irritated skin, or the week before an event.
Two numbers matter alongside the ingredient, and you are entitled to ask about both: the concentration and the pH. A high concentration at a high pH does less than a moderate concentration at a low one. A salon that knows and states both is working from understanding rather than from a product name.
Deeper skin tones warrant their own caution. They are more prone to pigment shifting after any irritation, so the sensible approach starts at a lower strength, builds more slowly and takes sun protection more seriously.
3. Downtime, cost and who is allowed to do it
The table below sorts the three levels by what they mean in practice. Prices are typical US salon ranges for 2026 and vary widely by region.
| Level | Examples | Downtime | Sessions | Price per session |
|---|---|---|---|---|
| Enzyme | papain, bromelain | none | as needed | 75–130 dollars |
| Superficial | mandelic, lactic, glycolic, salicylic | 0–3 days, light flaking | 4–6, two to four weeks apart | 100–200 dollars |
| Medium | TCA, Jessner | 5–10 days, visible shedding | 1–3, well spaced | 450–900 dollars |
| Deep | phenol | 2–4 weeks, months of redness | usually once | from 3,000 dollars |
Who may perform which level is set nationally, and the striking thing is that countries reason the same way and still land in different places. Germany draws it tightly: cosmetic treatment is confined to the dead surface layer, so a peel that deliberately injures deeper tissue counts as the practice of medicine and is reserved for doctors and licensed alternative practitioners. Poland cuts at a different depth by the same logic — medium and deep medical peels are named among the procedures reserved to physicians, which leaves superficial and enzyme peels squarely in the salon. Several other countries let beauty therapists work at strengths that would be out of bounds in either. The table above is therefore not only a guide to downtime; in some countries it sits close to the legal boundary itself.
The practical consequence is that a review or a price you read from another country may describe a different legal setting entirely. Check what applies where you are booking, and treat a salon offering a medium-depth peel at a superficial price as a warning rather than a bargain.
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4. The week before and the days after
Preparation decides a substantial share of the outcome. In the days before your appointment: no retinoids, no other acids, no shaving or waxing of the area, no sun and no sunbeds. Most providers ask you to pause retinoids for roughly five to seven days. If you are prone to cold sores, say so — a peel can trigger an outbreak, and preventive treatment is available through a doctor.
On the day the sequence is quickly told: cleanse, degrease, apply, watch, neutralise or remove, calm, protect. Stinging or tingling for a few minutes is normal and often eased with a small fan. A sharp pain that persists is not, and it should be said out loud immediately.
Afterwards the skin is vulnerable. For about a week, drop the sauna, steam room, hard exercise, scrubbing, mechanical exfoliants, retinoids and fragrance. What remains is short and unglamorous: gentle cleansing, a plain moisturiser and high-factor sun protection every day, cloud cover included.
The rule that matters most concerns the shedding: do not pull. What lifts, lifts by itself. Helping it along takes skin that was not finished yet, and that is precisely where marks and, at worst, scars come from. Leave two to four weeks between peels.
5. When a peel does not happen
There are situations in which a responsible provider declines or postpones. They include:
- isotretinoin treatment, or a gap of less than six months since finishing
- an active cold sore or any infection in the treatment area
- broken skin, eczema, psoriasis or fresh sunburn
- recent laser, microneedling or waxing on the same area
- a tendency to raised or keloid scarring
Pregnancy and breastfeeding call for restraint. Many providers avoid salicylic acid during that time, while mild enzyme and lactic acid treatments are generally considered less of a concern. The binding answer comes from your own doctor rather than from the treatment room.
Two expectations are worth settling at the outset. A peel improves surface, texture and tone. It does not remove deep scarring, it does not permanently shrink pores and it does not cure acne. And it is not a substitute for an examination: any pigmented spot that is changing in shape, colour or size belongs in front of a dermatologist before anyone treats around it.
What a peel does very reliably is improve a skin in small, visible increments — provided the level fits, the series is finished and the sun protection holds. Without that last part the treatment is working against the sun, and the sun wins.
Start one level lower than you think you need, and ask before the first session which agent is being used at what strength. If an offer promises considerably more than the level can deliver, either the promise is wrong or the level is.
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