Key Takeaways
The type of acid sets the job. Alpha Hydroxy Acids (AHAs) such as Glycolic, Lactic, and Mandelic Acid work at the surface, Salicylic Acid, the familiar Beta Hydroxy Acid (BHA), heads into oily pores, and Polyhydroxy Acids (PHAs) exfoliate gently.
Our top pick is Paula’s Choice SKIN PERFECTING 2% BHA Liquid Exfoliant, a short Salicylic Acid formula whose directions allow morning use, leaving your evenings free for a Retinoid.
Our one-step pick is the Resurfacing Compound from U Beauty, which puts Glycolic, Mandelic, and Lactobionic Acids in the same formula as a Retinol Ester.
Two brands here, The Ordinary and The INKEY List, say not to use their acid in the same routine as a Retinoid.
The best chemical exfoliant is usually the one whose acid fits your concern: Salicylic Acid for pores that look clogged on oily skin, an AHA like Glycolic or Lactic Acid for visible dullness or rough-feeling texture on drier skin, and a PHA for skin that stings easily. Each pick below also notes what its brand says about use alongside a Retinoid.
Types of Chemical Exfoliants: Alpha Hydroxy, Beta Hydroxy, and Polyhydroxy Acids
Cleveland Clinic sorts the two main types by what they dissolve in. AHAs are water-soluble and loosen what binds the outermost layer together so it can slough off. BHAs are oil-soluble, reach deeper into pores than AHAs, and also help dissolve sebum.
Among AHAs, size matters. A 2026 review of hydroxy acids in Frontiers in Cellular and Infection Microbiology lists Glycolic Acid at 76 daltons, Lactic Acid at 90, and Mandelic Acid at 152, and reports that Glycolic Acid “possesses the greatest cutaneous penetration capacity” because of its small size.
Salicylic Acid is the BHA on most labels. The FDA calls it the BHA most commonly used in cosmetics, with a footnote: From a chemist’s point of view, it isn’t a true BHA, though the industry labels it as one. The Frontiers review explains its reach: “Due to high lipophilicity, it actively and selectively penetrates sebum-rich pilosebaceous units.”
PHAs are the larger molecules. The review names Lactobionic Acid and Gluconolactone as the prominent two, says PHAs “possess significantly higher molecular weights” than AHAs or BHAs, and says both “induce mild exfoliation.”
Then there’s the Retinoid question. The American Academy of Dermatology names prescription Retinoid creams and Retinol among products that can make skin more sensitive, and says exfoliating on top of them may worsen dry skin or even cause breakouts. For Retinyl Esters, the research leans toward pairing. A 2024 review of cosmetic Retinoids found little evidence for them alone on photoaged skin, but said data suggest benefits may be seen in combination with other compounds, such as Hydroxy Acids.
At a Glance
Pick | Acid type | Timing or Retinoid guidance on the brand page | Price |
|---|---|---|---|
Paula’s Choice 2% BHA Liquid Exfoliant | BHA (Salicylic Acid) | Morning and/or evening use allowed | $37, 4 fl. oz. |
U Beauty Resurfacing Compound | AHAs and a PHA | Retinoid already in the formula | $228, 50 ml |
Pixi Glow Tonic | AHA (5% Glycolic Acid) | Morning and/or evening use allowed | $29, 250 ml |
The Ordinary Lactic Acid 10% + HA | AHA (Lactic Acid) | Not to be used with Retinoids | $9.20, 30 ml |
The Ordinary Mandelic Acid 10% + HA | AHA (Mandelic Acid) | Not to be used with Retinoids | $7.80, 30 ml |
The INKEY List PHA Toner | PHA (Gluconolactone) | Alternate nights with Retinol | $18, 100 ml |
CeraVe Renewing SA Cleanser | BHA and PHA, rinse-off | None given | $15.99, 8 fl oz |
How We Compared These Chemical Exfoliants
Nothing was tested on skin. In October 2026 we read each brand’s product page and ingredient list, sorted the picks by acid type, and compared stated strength, directions, warnings about Retinoids or sensitive skin, and cost per size.
1. Paula’s Choice SKIN PERFECTING 2% BHA Liquid Exfoliant: Best Salicylic Acid Exfoliant Overall
This leave-on liquid is about as plain as a chemical exfoliant gets: Salicylic Acid in a water and glycol base with green tea (Camellia Oleifera), 8 ingredients in all, at a pH range Paula’s Choice gives as 3.2 to 3.8. It takes the top spot for flexibility, since its directions cover morning, evening, or both, so on Retinoid nights the BHA can move to the morning.
Key features:
Salicylic Acid does the exfoliating. It’s suited to the look of clogged pores and oily areas.
Day or night. Up to twice daily if there’s no irritation, followed by sunscreen in the daytime, per the brand.
Fragrance-free, says Paula’s Choice, though it notes a faint scent from the ingredients themselves.
Tradeoff: Paula’s Choice asks anyone with a salicylate allergy to check with a physician first, and drier skin may prefer an AHA or PHA further down.
Best for: oily or breakout-prone skin that wants its Salicylic Acid step kept apart from the Retinoid.
Price: $37 for 4 fl. oz. (a 1 fl. oz. size is also listed).
2. U Beauty Resurfacing Compound: Best Multi-Acid Serum With a Built-In Retinoid
Instead of one acid, the Resurfacing Compound lists Glycolic and Mandelic Acid, both AHAs, plus Lactobionic Acid, a PHA. Beside them sits Retinyl Palmitate, which U Beauty calls its Stable Retinol Ester and describes as a gentle, effective Retinoid. That’s the Retinyl Ester and hydroxy acid combination the 2024 review describes, here in what U Beauty calls a holy-grail multitasking serum that combines the benefits of up to eight skincare steps.
Key features:
Acids and a Retinoid together. Sodium Ascorbyl Phosphate (a Vitamin C derivative), Tocopherol (Vitamin E), Sodium Hyaluronate, and Glycerin are listed too.
Reported results: In an independent 30-volunteer instrumental study, U Beauty reports that 96% saw a reduction in pore size after 15 days of consistent use, once daily.
First layer after cleansing. Two to three pumps on dry skin, morning, evening, or both, sealed with The SUPER Hydrator once dry.
An easy dial-back. If irritation shows up, U Beauty suggests evening-only use until it settles, with SPF whenever you go outside.
Tradeoff: at $228 for 50 ml it’s priced as performance luxury, and its ingredient list includes Methyldihydrojasmonate, which is used for fragrance. If clogged-looking pores are your main goal, the Salicylic Acid at #1 is the more direct match.
Best for: people who’d rather have exfoliating acids and a Retinoid in one step than plan separate acid and Retinoid nights.
Price: $228 for 50 ml.
3. Pixi Glow Tonic: Best Glycolic Acid Toner
Pixi’s toner carries 5% Glycolic Acid, the smallest AHA, in an alcohol-free base with Aloe Vera and Ginseng. It’s swept over the face, neck, and décolletage with a cotton pad.
Key features:
A stated 5% Glycolic Acid. Pixi pitches it for daily use on the look of dullness and uneven-looking texture.
Morning, evening, or both, with SPF on the days you use it.
Aloe Vera, which Pixi includes to comfort skin while it exfoliates.
Tradeoff: Cleveland Clinic says you may want to avoid pairing Glycolic Acid with Retinol when you first start it, so keep the two on separate nights at the outset. Pixi also suggests sensitive skin begin with limited weekly use.
Best for: normal to oily skin that wants a daily Glycolic Acid swipe.
Price: $29 for 250 ml (8.5 fl oz).
4. The Ordinary Lactic Acid 10% + HA: Best Lactic Acid Exfoliant
This serum pairs Lactic Acid, one of the gentler AHAs by Cleveland Clinic’s account, with Sodium Hyaluronate Crosspolymer and Tasmannia Lanceolata extract. Don’t let the short label fool you: The Ordinary calls it a high-strength exfoliator.
Key features:
Lactic Acid at 10%. Cleveland Clinic says the acid also works as a moisturizer.
Once daily, ideally in the evening. You can dilute it with other products while skin builds tolerance, the brand says.
Clear Retinoid guidance. The Ordinary lists Retinoids among the products not to use with it, so it belongs on your off nights.
Tradeoff: the label reads “Do not use on sensitive, peeling, or compromised skin,” and it carries a Sunburn Alert.
Best for: dry-feeling, visibly dull skin on the nights you skip the Retinoid.
Price: $9.20 for 30 ml.
5. The Ordinary Mandelic Acid 10% + HA: Best Budget Mandelic Acid
Mandelic Acid is the largest of the three AHAs here, at twice the molecular weight of Glycolic Acid by the Frontiers review’s figures. The Ordinary calls this 10% formula a gentle exfoliator in serum form. For more formulas built on this acid, see our Mandelic Acid serum roundup.
Key features:
Mandelic Acid at 10%, listed third on the ingredients.
Evening, once a day, with the same dilution tip as the Lactic Acid serum.
The lowest price on this list, at $7.80.
Tradeoff: the same sensitive-skin warning applies, and Retinoids are on this one’s do-not-use-with list as well.
Best for: a low-cost first AHA used on alternate nights from a Retinoid.
Price: $7.80 for 30 ml.
6. The INKEY List PHA Toner: Best Polyhydroxy Acid Exfoliant
This is the PHA pick: 3% Gluconolactone with 3% Niacinamide and Aloe Vera, swept on with a cotton pad and left on. The INKEY List says PHA’s larger molecules “work more slowly and gently” than Glycolic Acid.
Key features:
Gluconolactone at 3%. It’s one of the two PHAs the Frontiers review names.
Niacinamide in the same bottle, so the brand advises against adding another Niacinamide product.
Plain Retinol directions. Alternate nights with Retinol, and don’t layer the two in one routine, says The INKEY List.
A slow start. A few times a week at first, building toward daily use.
Tradeoff: it’s built for gentleness, so anyone who wants a high-strength AHA can find one higher on this list.
Best for: skin that finds AHAs too much, on the nights between Retinoid applications.
Price: $18 for 100 ml.
7. CeraVe Renewing SA Cleanser: Best Rinse-Off Chemical Exfoliant
Not every chemical exfoliant stays on. CeraVe’s rinse-off cleanser lists Salicylic Acid and Gluconolactone, a PHA, and the brand says it suits the face and body, acne-prone skin included.
Key features:
A BHA and a PHA. Both appear on the ingredient list.
Ceramides NP, AP, and EOP, with Niacinamide, Hydrolyzed Hyaluronic Acid, and Cholesterol.
Fragrance-free and non-comedogenic, according to CeraVe.
Tradeoff: CeraVe doesn’t state its Salicylic Acid percentage or give Retinoid guidance, so with the AAD’s warning about dry skin in mind, a plain cleanser is the more cautious pick on Retinoid nights.
Best for: normal or acne-prone skin, face or body, that wants exfoliation in the cleansing step.
Price: $15.99 for 8 fl oz.
How to Add a Chemical Exfoliant to a Retinoid Routine
Start with one type. A BHA for oily, clogged-looking areas, an AHA for visible dullness and rough-feeling texture, a PHA if other acids sting.
Read the label on Retinoids. Morning use, where a brand allows it, keeps the evening free for the Retinoid.
Build up slowly. A Cleveland Clinic dermatology resident suggests starting Glycolic Acid once or twice a week and working up to nightly.
Moisturize right after. The AAD advises applying moisturizer as soon as you finish exfoliating.
Wear sunscreen daily. Cleveland Clinic says acids leave newly exposed skin more susceptible to the sun.
Go easy on darker skin. The AAD advises against strong chemical exfoliation for darker skin, or if you tend to get dark spots after acne, burns, or bug bites.
See a board-certified dermatologist if redness, burning, or peeling lingers after you stop the acid, if new dark patches appear, or if you’re pregnant or planning to be, since the AAD says Retinoids should not be used during pregnancy.
Frequently Asked Questions
What Is the Best Chemical Exfoliant for Beginners?
A single-acid product at a modest strength, used a few times a week. The PHA toner and the 5% Glycolic Acid toner here give the clearest build-up directions.
Is Salicylic Acid an AHA or a BHA?
It’s sold as a BHA, and the FDA calls it the most common one in cosmetics, though the agency notes that chemically it isn’t a true BHA. Unlike AHAs, it’s oil-soluble.
Can I Use a Chemical Exfoliant and Retinol on the Same Night?
The Ordinary and The INKEY List say no, and the AAD cautions that exfoliating on top of Retinol may leave dry skin worse. Alternate nights, or choose one formula that already combines the two.
Which Type of Chemical Exfoliant Is Gentlest?
Generally, PHAs. The Frontiers review says its two prominent PHAs “induce mild exfoliation.” Among AHAs, Cleveland Clinic counts Lactic Acid as one of the gentler options.
Do Chemical Exfoliants Make Skin More Sensitive to the Sun?
They can. The Ordinary’s AHA serums carry a Sunburn Alert, the FDA says Glycolic Acid can make people more susceptible to sunburn, and it advises sun protection with BHA products too.