Chemical vs Enzymatic Peel: Which is better for your skin?

Exfoliation is one of the easiest steps in skincare to overdo. Remove too little and dull, flaky skin lingers; remove too much, too often, and you weaken the very barrier you are trying to improve. Most of the confusion starts with the words themselves. "Chemical peel" and "enzymatic peel" are often presented as two opposites, when in reality an enzymatic peel is a specific, gentler branch of chemical exfoliation. Understanding what each one actually does at the level of the skin’s surface is what lets you choose the right one — and use it at a frequency your skin can tolerate.

This guide explains how acid-based and enzyme-based peels work, what separates them in practice, and how to match a method to your skin type, from reactive and sensitive to oily and blemish-prone.

What exfoliation actually is

The outermost layer of skin, the stratum corneum, is made of flattened dead cells called corneocytes, held together by protein "rivets" known as desmosomes. In healthy skin these connections are broken down enzymatically over time so that the oldest cells shed invisibly — a process called desquamation. When that natural shedding slows down, dead cells accumulate, and the skin can look dull, rough or flaky, with clogged pores.

Exfoliation is simply a way of supporting or accelerating that shedding. There are two broad strategies. Mechanical exfoliation physically buffs cells away with grains or a tool. Chemical exfoliation, the focus of this article, dissolves the bonds that hold dead cells in place — either with acids or with enzymes. Because chemical methods work on the bonds rather than abrading the surface, they are generally more even and, when chosen correctly, gentler than scrubbing.

Chemical peels: how acids work

Acid exfoliants fall into two main families. Alpha hydroxy acids (AHAs) — such as lactic and glycolic acid — are water-soluble and work mainly on the surface. Beta hydroxy acid (BHA) — salicylic acid — is oil-soluble and can also work inside the pore, which makes it useful for oily and blemish-prone skin.

The core mechanism of AHAs is a reduction in corneocyte cohesion: they loosen the bonds holding dead cells together in the lower part of the stratum corneum, which encourages those cells to release and the surface to renew [1]. Importantly, ultrastructural studies of glycolic acid show this is a "targeted" action on the desmosomes of the outermost, already-loosening layer (the stratum disjunctum), without disrupting the deeper barrier structures at the concentrations used in cosmetics [2]. In other words, a well-formulated acid peel works with the skin’s renewal process rather than stripping it.

Why lactic acid is the gentle starting point

Among the AHAs, lactic acid is the usual recommendation for beginners and for sensitive skin. It is a larger molecule than glycolic acid, so it penetrates more slowly and acts more gradually. It is also a humectant and a natural component of the skin’s own moisturising system, which means it draws and holds water as it exfoliates.

There is a measurable barrier benefit too. In a controlled study, lactic acid increased the skin’s production of ceramides — the lipids that hold the barrier together — with the L-isomer raising stratum corneum ceramide levels by 48%, and this translated into improved barrier function and resistance to dryness [3]. That combination of exfoliation plus barrier support is why lactic acid is often the AHA of choice when skin is reactive or prone to dryness.

Enzymatic peels: papain and bromelain

Enzymatic peels take a different route to the same goal. Instead of acids, they use proteolytic (protein-digesting) enzymes derived from fruit — most commonly papain from papaya and bromelain from pineapple. These enzymes catalyse the breakdown of keratin proteins in the stratum corneum, releasing dead surface cells and supporting cell turnover, without the abrasion of a scrub [4].

The defining feature of enzymes is selectivity. They act on the proteins of the outermost dead-cell layer and are generally well tolerated, with minimal irritation across a broad pH range, which is why they are favoured in formulations for sensitive skin [4]. Bromelain in particular is valued for its soothing profile on redness-prone skin. Because enzymatic peels work only at the very surface, they typically produce no visible flaking and little to no downtime — at the cost of a milder, more gradual result than a stronger acid.

Chemical vs enzymatic: a practical comparison

It helps to think of these not as rivals but as points on a spectrum of intensity. The table below summarises the practical differences.

	Acid peel (AHA/BHA)	Enzymatic peel
Active	Lactic, glycolic (AHA); salicylic (BHA)	Fruit proteases: papain, bromelain
How it works	Loosens bonds between dead cells; BHA also works in the pore	Digests surface keratin proteins only
Depth	Surface to upper layers (concentration-dependent)	Surface only
Irritation potential	Low to moderate (rises with strength)	Low
Best for	Texture, dullness, blackheads, fine lines, uneven tone	Sensitive, reactive, redness-prone skin; beginners
Typical frequency	1×/week to start; up to 2–3× once tolerated	Can be used more frequently; still 1–2×/week is sensible

How to choose by skin type

The right method depends less on trends and more on how reactive your skin is and what you want to address.

Sensitive or reactive skin. Start with an enzymatic peel or a low-strength AHA (around 5% or below), no more than once a week. These options exfoliate while keeping the risk of stinging, redness and barrier disruption low. If you tolerate that well over several weeks, you can reassess.

Normal to resilient skin. A stronger AHA — for example a 12% lactic acid formula — can be used once a week to begin with, building up to two or three times a week if your skin stays comfortable. This is the level at which you tend to see clearer improvements in texture, tone and the look of pores.

Oily and blemish-prone skin. Salicylic acid (BHA) has the advantage of being oil-soluble, so it can work inside the pore where blackheads form. Lactic acid also has a role here, since it helps normalise surface shedding and unclog pores. For more on managing oilier skin day to day, see our guide on caring for oily skin.

Skin with uneven tone or post-blemish marks. Regular, gentle AHA exfoliation can improve the look of discolouration over time by speeding surface renewal. This works best as part of a broader routine rather than as a quick fix.

One universal rule: whichever method you choose, introduce only one new exfoliating active at a time, and avoid stacking it with other strong actives such as retinoids in the same routine until you know how your skin responds.

After exfoliating: barrier and sun protection

Exfoliating acids make freshly renewed skin temporarily more vulnerable to ultraviolet light. This is not a marketing caution — it is documented. Regulatory review of AHA cosmetics found that applying an AHA increased the skin’s sensitivity to UV-induced redness by 18% after four weeks of use, and that this heightened sensitivity can persist for up to a week after you stop [5]. A controlled study similarly showed that topical glycolic acid increased markers of UV damage in the skin, including erythema, DNA damage and sunburn-cell formation [6].

The practical conclusion is simple: daily broad-spectrum sunscreen of at least SPF 30 is part of any exfoliation routine, not an optional extra. Without it, you risk trading short-term smoothness for worsened pigmentation and premature ageing. For the full picture on photoprotection, see our dedicated guide.

Beyond SPF, support recovery by keeping the rest of your routine gentle on peel days: a mild cleanser, a barrier-supporting moisturiser, and no second exfoliant. Always patch-test a new peel before applying it to the whole face.

The Ph.Doctor approach to gentle exfoliation

Ph.Doctor is a dermocosmetics line developed by Dr. Nina Wiśniewska and biotechnologist Anna Sienkiewicz, built on a "less is more" philosophy: few ingredients, each with a defined function. For exfoliation, two products map onto the steps above — careful preparation of the skin, and a single, well-tolerated acid peel.

Good exfoliation starts with clean skin. The Osmogel Precleanser is the first cleansing step, removing make-up and UV filters before any further care; the lactic-acid peel is then applied to skin that has been thoroughly cleansed and dried.

Osmogel Precleanser is an "osmotic gel with micellar technology for eye and face make-up removal… Removes makeup and UV filters." It is "dedicated to all skin types, including sensitive skin," has a "formula consistent with the natural pH of the skin," and is "suitable during dermatological treatment." It is used as the first stage of cleansing, followed by the Gentle facial cleansing emulsion.

For the peel itself, the Lactic acid 12% Face and body peeling is an AHA exfoliant formulated to stay tolerable.

Lactic acid 12% Face and body peeling is described as a peeling with 12% lactic acid that is "suitable for all skin types, including sensitive skin" and "gently removes dead skin cells, leaving the skin smooth and moisturized." The card notes that lactic acid "belongs to alpha-hydroxy acids (AHA)," is part of the skin’s "natural moisture factor," works as a "humectant" that "improves skin hydration," and that the product "stimulates the production of collagen, elastin and ceramides." It is a vegan formula (97% natural ingredients) and "suitable for pregnant and breastfeeding women."

Usage follows the cautious approach described above. The card directs you to "apply a small amount… in the evening on cleansed and dried skin" and "wash off after 15 minutes," at a frequency of "1–2 times a week" for the face. It also instructs that while using the peel you should "use daily creams with UVA/UVB sunscreen min. SPF 30–50," and to perform an allergy test before first use. The peel should not be used on areas of acute inflammation or in case of known allergy to any component.

If you are unsure where to begin, the principle is the same one that runs through this article: start gently, exfoliate no more than your skin comfortably tolerates, and protect the result with sunscreen.

Frequently asked questions

Which is better, an enzymatic or a chemical peel?

Neither is universally better — they sit at different points on the same spectrum. Enzymatic peels are milder and act only at the surface, which suits sensitive, reactive or redness-prone skin and anyone new to exfoliation. Acid peels can deliver clearer results for texture, dullness and pores, but ask more of the skin. The best choice is the gentlest method that achieves what you want.

How often should I exfoliate my face?

For most people, starting once a week is sensible, increasing only if the skin stays comfortable. Sensitive skin should generally stay at one gentle session a week. More resilient skin can build up to two or three times a week with a stronger acid. Signs you are overdoing it include tightness, stinging, persistent redness and flaking — if these appear, reduce frequency.

Is an enzymatic peel suitable for sensitive skin?

Yes — it is often the preferred option. Fruit enzymes such as papain and bromelain act only on dead surface proteins and are generally well tolerated, with little irritation. Bromelain in particular has a soothing reputation on redness-prone skin. As with any new product, patch-test first and keep the rest of the routine simple.

What concentration of lactic acid should I use at home?

Home AHA peels commonly range from around 5% to 15%. Lower concentrations suit sensitive or beginner skin, while well-tolerated skin can use stronger formulas such as 12%. Whatever the strength, frequency matters as much as concentration: start once a week and adjust based on how your skin feels.

Do I have to use SPF after a peel?

Yes. Acids increase the skin’s sensitivity to UV, and that sensitivity can persist for several days after use. Daily broad-spectrum sunscreen of at least SPF 30 protects the freshly renewed skin and prevents the pigmentation and premature ageing that unprotected exposure can cause. Treat sunscreen as part of the exfoliation routine, not an afterthought.

Can I do a chemical peel at home?

Yes, within limits. At-home peels are formulated at lower strengths than professional treatments and are designed for short contact times. Follow the product’s instructions on amount, timing and frequency exactly, always patch-test first, and avoid using them on broken or inflamed skin. Stronger, deeper peels belong in a clinic.

When should I avoid exfoliating?

Skip peels on skin that is sunburnt, broken, actively inflamed or experiencing a flare. Avoid them if you have a known allergy to any ingredient in the product. Take particular care if you are already using other strong actives such as retinoids, and introduce only one new active at a time. If in doubt, especially during dermatological treatment, check with a professional first.

Should I exfoliate before or after cleansing?

After. Exfoliating acids and enzymes work best on clean, dry skin, so make-up, sunscreen and surface oils should be removed first. A two-step cleanse — a make-up-removing precleanser followed by a gentle cleanser — prepares the skin so the peel can work evenly.

---

Selected references

1. Van Scott EJ, Yu RJ. Alpha hydroxy acids: procedures for use in clinical practice. Cutis. 1989;43(3):222–228. AHAs reduce the thickness of hyperkeratotic stratum corneum by reducing corneocyte cohesion at lower levels of the stratum corneum.
2. Fartasch M, Teal J, Menon GK. Mode of action of glycolic acid on human stratum corneum: ultrastructural and functional evaluation of the epidermal barrier. Arch Dermatol Res. 1997;289(7):404–409. Glycolic acid acts through a "targeted" desmosomal action in the stratum disjunctum without disrupting deeper barrier structures at the concentration used.
3. Rawlings AV, Davies A, Carlomusto M, et al. Effect of lactic acid isomers on keratinocyte ceramide synthesis, stratum corneum lipid levels and stratum corneum barrier function. Arch Dermatol Res. 1996;288(7):383–390. L-lactic acid increased stratum corneum ceramides by 48% and improved barrier function.
4. Trevisol TC, Henriques RO, Souza AJA, Furigo A Jr. An overview of the use of proteolytic enzymes as exfoliating agents. J Cosmet Dermatol. 2022;21(8):3300–3307. Proteolytic enzymes such as papain and bromelain mimic the skin’s desquamation process and are applied as exfoliants; pH, temperature and stabilisation are key formulation factors.
5. U.S. Food & Drug Administration. Alpha Hydroxy Acids (Cosmetic Ingredients). AHA use increased UV sensitivity (skin reddening) by 18% after four weeks; effect can persist up to a week after stopping; SPF advised.
6. Kornhauser A, Wei RR, Yamaguchi Y, et al. The effects of topically applied glycolic acid and salicylic acid on ultraviolet radiation-induced erythema, DNA damage and sunburn cell formation in human skin. J Dermatol Sci. 2009;55(1):10–17. Topical glycolic acid increased UV-induced erythema, DNA damage and sunburn-cell formation; salicylic acid did not produce significant changes.