Best BHA Exfoliant: 6 Salicylic Acid Liquids, Serums and Pads Compared

The best BHA exfoliants are Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant, The Ordinary Salicylic Acid 2% Solution and PanOxyl Clarifying Exfoliant. Paula's Choice is best overall because its 2% salicylic acid comes in a light, fragrance-free liquid at a low pH that suits blackheads and oily skin. The Ordinary is the cheapest way to try a 2% leave-on, and PanOxyl is the easiest to find at the drugstore.

Before you buy, you can scan an exfoliant's barcode or label with the ingredient scanner in Pori to check its ingredients against your skin type. Pori flags ingredients; it does not diagnose skin conditions.

Quick picks

• Best overall: Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant ($37 for 4 oz, paulaschoice.com) - 2% salicylic acid at pH 3.5, fragrance-free and alcohol-free.
• Best budget: The Ordinary Salicylic Acid 2% Solution ($6.70 for 30 ml, theordinary.com) - 2% leave-on labeled as an acne drug, for spot or zone use.
• Best drugstore liquid: PanOxyl Clarifying Exfoliant ($13.49 for 4 oz, Ulta) - 2% salicylic acid, alcohol-free, with no fragrance in its ingredient list.
• Best fragrance-free mid-price: Naturium BHA Liquid Exfoliant 2% ($19, naturium.com) - encapsulated salicylic acid at pH 3.5 to 4.0.
• Best for blackheads with niacinamide: COSRX BHA Blackhead Power Liquid ($25 for 100 ml, cosrx.com) - betaine salicylate in willow bark water, with niacinamide.
• Best pads: Stridex Maximum Strength pads ($9.18 for 55, Target) - 2% salicylic acid and alcohol-free, but with fragrance and menthol.

We compared published ingredient lists, brand claims and listed prices; we did not test these products on skin. Prices are US list prices as of November 2026, with the retailer named, and they change often.

How do the best BHA exfoliants compare?

What makes a good BHA exfoliant?

BHA in skincare almost always means salicylic acid or a close relative such as betaine salicylate. Salicylic acid dissolves in oil, so it can work inside the pore. A review of salicylic acid in dermatology describes it as comedolytic and able to decrease sebum secretion, which is why it is the standard first acid for blackheads. Our AHA vs BHA guide explains how it differs from glycolic and lactic acid.

Three things separate one 2% BHA from another:

• Strength. US acne products can contain 0.5% to 2% salicylic acid. A product sold as an acne drug must state its percentage; a cosmetic doesn't have to.
• pH. Acids exfoliate more at lower pH. Paula's Choice gives pH 3.5 for its liquid and Naturium gives 3.5 to 4.0; many brands don't publish a figure.
• Base. Alcohol, fragrance and menthol add sting without adding exfoliation. Fragrance-free, alcohol-free formulas are the safer start for most skin.

Which BHA exfoliant should you pick?

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant: best overall

The benchmark leave-on BHA. Paula's Choice lists it at $37 for 4 oz (118 ml) and says it is fragrance-free, alcohol-free and vegan, at pH 3.5. It is a thin liquid you sweep on with a cotton pad or fingers and leave on.

Who it suits: oily and combination skin with blackheads, enlarged-looking pores and bumpy texture. Who should skip it: dry or reactive skin, or anyone already using a strong retinoid every night. The catch: it costs about $0.31 per ml, against about $0.22 for The Ordinary's 2% solution and about $0.11 for PanOxyl's liquid. Our Paula's Choice 2% BHA review covers how often to use it, purging and cheaper alternatives in detail.

The Ordinary Salicylic Acid 2% Solution: best budget

The Ordinary sells 30 ml for $6.70 and labels it as an acne drug, with the standard directions to start once a day and build up. It is a light serum, so it works well applied only to the nose, chin or a breakout-prone patch.

Who it suits: oily or acne-prone skin on a budget, and anyone who wants to treat only some areas. Who should skip it: people who want a toner-style liquid to sweep over the whole face. The catch: 30 ml goes quickly if you use it all over. The brand also sells a water-free Salicylic Acid 2% Anhydrous Solution; see our The Ordinary guide.

PanOxyl Clarifying Exfoliant: best drugstore liquid

PanOxyl's leave-on liquid has 2% salicylic acid as its active. Ulta lists it at $13.49 for 4 oz, describes it as alcohol-free and pH-balanced, and its inactive ingredients include betaine, glycerin, chamomile extract and blue algae extract, with no fragrance listed.

Who it suits: oily and acne-prone skin that wants a Paula's Choice-style liquid for about a third of the price. Who should skip it: sensitive skin should still start every other night. The catch: PanOxyl doesn't publish the pH value, so it is hard to compare its exfoliating strength directly.

Naturium BHA Liquid Exfoliant 2%: best fragrance-free mid-price

Naturium lists this at $19, with encapsulated salicylic acid, a stated pH of 3.50 to 4.00, and Australian finger lime and other citrus fruit extracts. The brand calls it fragrance-free and alcohol-free and says to start every other night.

Who it suits: normal to oily skin that wants a low-pH liquid without the Paula's Choice price. Who should skip it: anyone who reacts to citrus extracts. The catch: encapsulation is meant to release the acid gradually, but Naturium's clinical claim is its own study, and it doesn't publish the details on the product page.

COSRX BHA Blackhead Power Liquid: best for blackheads with niacinamide

COSRX sells 100 ml for $25. Its first ingredient is willow bark water, followed by betaine salicylate, niacinamide, panthenol and sodium hyaluronate, with no fragrance in the list. Betaine salicylate is a salicylic acid derivative often described as gentler, though there is little head-to-head research.

Who it suits: oily skin with blackheads on the nose and chin, especially if you like K-beauty textures. Who should skip it: beginners; COSRX itself labels it for mid-level acid users. The catch: COSRX doesn't state the betaine salicylate percentage on its US page, and the product isn't sold as an acne drug. Our COSRX guide covers the rest of the range.

Stridex Maximum Strength pads: best pads

Stridex lists 2% salicylic acid as the active and says its pads are alcohol-free. The inactive list includes ammonium lauryl sulfate, fragrance and menthol. Target sells 55 pads for $9.18.

Who it suits: oily skin and body acne on the chest or back, and anyone who wants something easy to use after the gym. Who should skip it: fragrance-sensitive or dry skin. The catch: fragrance and menthol can sting; the brand also tells you not to leave the pad on the skin for long periods.

Is a rinse-off BHA enough?

For mild clogging, often yes. A salicylic acid cleanser has less contact time, so it works more gently, which suits combination or sensitive skin and large areas like the back. CeraVe Renewing SA and Cetaphil Gentle Exfoliating SA are mild rinse-off options; our best salicylic acid cleanser roundup compares them with full-strength 2% washes. Use one or the other: pairing a BHA wash with a BHA leave-on mostly adds dryness.

How do you start a BHA exfoliant?

1. Patch test. The FDA suggests testing any product that contains a BHA on a small area of skin before using it widely.
2. Start slowly. Use it every other evening for two weeks after cleansing, then build up to daily if your skin stays comfortable. Our how often to exfoliate guide has a schedule.
3. Follow with moisturizer. The AAD advises applying moisturizer immediately after exfoliating because exfoliating can be drying.
4. Wear sunscreen daily. The FDA advises sun protection while using BHA products.
5. Don't stack actives at first. Retinoids and benzoyl peroxide already make skin more sensitive. The AAD warns that exfoliating while using them may worsen dry skin or even cause breakouts.

Expect smoother texture in a few weeks and fewer blackheads after about two months. Some people see a short flare of small bumps at first; our purging vs breakout guide explains how to tell it from a reaction. Check whether your "blackheads" are actually sebaceous filaments, which are normal and come back.

Who should avoid BHA exfoliants?

• Very dry, eczema-prone or sunburned skin. The AAD says never exfoliate if your skin is sunburned or has open cuts.
• Darker skin that marks easily. The AAD notes that aggressive exfoliation can lead to increased pigmentation in darker skin tones. Start with a lower frequency.
• Reactive skin. A mandelic or lactic acid exfoliant may suit better; see our best exfoliator for sensitive skin.
• Pregnancy or breastfeeding. Ask your clinician before starting any leave-on acid.

If your acne is painful, cystic or scarring, a leave-on BHA won't be enough. A dermatologist can prescribe stronger treatment.

How we chose

We looked at leave-on salicylic acid and betaine salicylate exfoliants sold in the US in November 2026 and compared their stated strength, pH where published, full ingredient lists, fragrance and price per ml. We favored fragrance-free, alcohol-free formulas and flagged those that aren't. We kept the Paula's Choice section short because our full review covers it, and we avoided repeating that review's dupe table. Our catalogue has no leave-on BHA yet, so the product cards above show rinse-off options only. Sources include the FDA, the FDA acne monograph, the AAD, a peer-reviewed review of salicylic acid, and brand and retailer pages. We did not wear-test these products. Browse more in our exfoliants for oily skin catalogue.