What is the best chemical exfoliant?

It depends which family your skin needs. For congestion, blackheads and oily skin, a 2 percent BHA such as Paula's Choice. For dullness and uneven tone, an AHA at 8 to 10 percent. For skin that reacts easily, lactic acid at a low percentage, used about once a week.

What percentage exfoliant should I start with?

For BHA, 2 percent is the leave-on maximum, so that is the top rather than a mid-strength option. For AHA, start at 8 to 10 percent, below the 10 to 15 percent consumer ceiling. The two scales are not comparable, so do not read 2 percent as weaker than 10.

How often should you use a chemical exfoliant?

Every other day at most when starting, and once a week if your skin is reactive. Frequency causes more trouble than concentration for most people. Use one acid at a time and always wear sunscreen, since exfoliation increases sun sensitivity.

Are expensive exfoliants better than cheap ones?

Not on the active, which is the same molecule at the same permitted strength. What you pay more for is formulation and texture, and that matters only because a product you find pleasant is one you keep using. Budget options from The Ordinary or CeraVe are genuinely effective.

The Best Chemical Exfoliant, Settled

There is no single best chemical exfoliant, and any article claiming otherwise is picking one skin type and ignoring the rest. What there is instead is a fairly short decision tree, and once you are through it the choice is close to obvious.

The criteria

The right acid family first. BHAs are oil-soluble and work inside pores, AHAs are water-soluble and work on the surface. Getting this wrong means a perfectly good product doing nothing for your actual concern.

Concentration in context. Leave-on BHA is capped at 2%, while consumer AHAs run 10 to 15%. Those numbers are not on the same scale and comparing them directly is the most common shopping error.

Where the active sits in the ingredient list. Regulated, ordered by concentration down to 1%, and the fastest way to tell whether the acid is the product or the garnish.

Texture, which decides whether you keep using it. The best exfoliant is the one that survives contact with your actual evenings. This sounds soft and it is the single biggest predictor of results.

For congestion: Paula’s Choice 2% BHA

$35 for 4oz, $14 for the travel size. Salicylic acid at the 2% leave-on ceiling, sitting second on the ingredient list, with green tea extract in the formula.

It takes this because of the texture as much as the formula. It goes on like a toner rather than a treatment, which is why people keep using it, and consistency is what actually clears congestion. Blackheads, clogged pores, bumpy texture and oily skin are its territory.

Start with the $14 travel size. A BHA at full strength is not a certainty for every skin, and that is a cheaper way to find out. The full verdict also covers where the wider range is less convincing.

For tone and texture: an AHA in the 8 to 10% range

For dullness, uneven tone, sun damage or fine lines, a BHA is the wrong family and no brand fixes that.

What to look for rather than a single product: glycolic or lactic acid at 8 to 10% to start, well below the 10 to 15% consumer ceiling, with the acid high in the ingredient list. Glycolic is the more potent of the two because its molecule is smallest and penetrates furthest, which is both why it works and why it stings.

Dermstore is the most useful place to shop this specifically, since its clinical range runs past 750 brands including lines like SkinCeuticals and Obagi that general beauty retailers often skip.

For reactive skin: lactic acid, low, or nothing yet

If your skin reacts to most things, the answer is not a gentler version of a strong product. It is a different acid.

Lactic acid, or a low-percentage salicylic, is the sensible entry. Both are better tolerated than glycolic. Start once a week, not every other day, and give it a month before deciding anything.

If ingredient screening is part of why you are cautious, Credo is the retailer built for that, with a published list of over 2,700 restricted chemicals behind everything it stocks. What that standard does and does not mean is worth two minutes.

What we are not going to pretend

The Ordinary sells effective acids for under $10 and CeraVe puts salicylic acid in a $15 cleanser that a great many people do perfectly well on. If budget is the binding constraint, those are genuinely good answers and nothing here beats them on value. We do not link them because you did not need us to tell you they exist.

The case for spending more is narrow and specific: better texture, which means better adherence, which means results. If cheap acids have never put you off using them, keep buying cheap acids.

Before you start any of them

One acid at a time, every other day at most, and sunscreen without exception, since exfoliation increases sun sensitivity and skipping SPF undoes the work. Our SPF picks are here.

And if the first weeks look worse rather than better, there is a way to tell whether that is normal before you decide the product failed.

Frequently asked

What is the best chemical exfoliant?: It depends which family your skin needs. For congestion, blackheads and oily skin, a 2 percent BHA such as Paula's Choice. For dullness and uneven tone, an AHA at 8 to 10 percent. For skin that reacts easily, lactic acid at a low percentage, used about once a week.
What percentage exfoliant should I start with?: For BHA, 2 percent is the leave-on maximum, so that is the top rather than a mid-strength option. For AHA, start at 8 to 10 percent, below the 10 to 15 percent consumer ceiling. The two scales are not comparable, so do not read 2 percent as weaker than 10.
How often should you use a chemical exfoliant?: Every other day at most when starting, and once a week if your skin is reactive. Frequency causes more trouble than concentration for most people. Use one acid at a time and always wear sunscreen, since exfoliation increases sun sensitivity.
Are expensive exfoliants better than cheap ones?: Not on the active, which is the same molecule at the same permitted strength. What you pay more for is formulation and texture, and that matters only because a product you find pleasant is one you keep using. Budget options from The Ordinary or CeraVe are genuinely effective.