Salicylic vs glycolic acid
The whole difference is solubility. One goes into a pore, one works across the surface, and that single property decides which problem each of them can actually fix.
By Sawyer V. · Published
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
The short version
Salicylic is oil-soluble, so it gets inside the follicle. That makes it the acid for blackheads, bumps, oily skin and body acne - the problems that live in a pore. Glycolic is water-soluble, so it works across the surface. That makes it the acid for rough texture, dullness and uneven tone. Both need a published pH to work: 2 per cent at pH 3.5 and 7 per cent at pH 3.6 are the reference points here.
| # | Pick | Lasts | Score | Price |
|---|---|---|---|---|
| 1 | Paula's Choice Skin Perfecting 2% BHA Liquid Clogged pores and ingrown hairs | ~59 uses | 7.8/10 | $37.00 - view on Amazon |
| 2 | The Ordinary Glycolic Acid 7% Exfoliating Toner Surface texture and dullness, on the body as much as the face | ~120 uses | 8.4/10 | $13.50 - view on Amazon |
| 3 | CeraVe SA Smoothing Cleanser Exfoliating without adding a step | ~120 uses | 9.4/10 | $11.99 - view on Amazon |
| 4 | AmLactin Daily Nourish Lotion (12% Lactic Acid) The only published acid percentage in the category | ~16 uses | 7.2/10 | $13.99 - view on Amazon |
Prices last verified September 24, 2026. They move constantly; the figure on Amazon when you click is the real one.
The entire difference is solubility
Salicylic acid is a beta hydroxy acid and it is oil-soluble. Glycolic acid is an alpha hydroxy acid and it is water-soluble. Everything else about this comparison follows from those two facts.
A follicle is full of sebum. An oil-soluble acid dissolves into that sebum and travels down into the pore, where a blackhead or a plug actually sits. A water-soluble acid cannot - it works across the surface of the skin, loosening the bonds between dead cells so they release.
Which one for which problem
| Problem | Where it lives | Acid |
|---|---|---|
| Blackheads | Inside the follicle | Salicylic |
| Bumpy, congested skin | Inside the follicle | Salicylic |
| Oily skin, large pores | In and around the follicle | Salicylic |
| Body and back acne | Inside the follicle | Salicylic |
| Rough surface texture | Skin surface | Glycolic |
| Dullness, uneven tone | Skin surface | Glycolic |
| Dry, rough body skin | Surface, needs water held in | Lactic |
| Ingrown hairs | Follicle opening | Salicylic |
Two published figures decide whether either works
Solubility tells you which acid. Two other numbers tell you whether the product does anything, and most of this category publishes neither.
- Concentration. The number on the front. For salicylic, 0.5 to 2 per cent is the working range and 2 is the standard. For glycolic, roughly 5 to 10 per cent for at-home use.
- pH. The number almost nobody prints. Above roughly pH 4 a salicylic acid is largely inert whatever the percentage says. A product publishing both is the only kind that can be ranked.
| Product | Acid | Concentration | pH | Size |
|---|---|---|---|---|
| Paula's Choice 2% BHA | Salicylic | 2% | 3.5 | 118 ml |
| The Ordinary Glycolic 7% | Glycolic | 7% | approx. 3.6 | 240 ml |
| CeraVe SA Cleanser | Salicylic | Not published | Not published | Not published |
| AmLactin Daily Nourish | Lactic | 12% | Not published | 234 ml |
The bottom two rows are there to show the normal state of this category. Both are good products - the CeraVe publishes its full ingredient list and AmLactin publishes its percentage on the front of the tube - and neither gives you enough to compare on strength.
Salicylic: the default for most men
If you are picking one acid and you are not sure, pick this one. Male skin tends toward oilier and larger-pored, and the problems that brings - blackheads, congestion, bumps - all live inside the follicle where only an oil-soluble acid reaches.
It is also better suited to a face that gets shaved. Shaving is already exfoliation; adding a surface exfoliant on top of it compounds the abrasion, while salicylic is doing its work somewhere the blade never went.
The reference is 2 per cent at pH 3.5. The exfoliant roundup ranks the field on exactly those two figures, and the blackhead page explains the mechanism in the pore.
Glycolic: for texture, once salicylic is established
Glycolic is the smallest AHA molecule, which means it penetrates the surface efficiently and is correspondingly more irritating than the larger ones. It is the right tool for rough texture, dullness and uneven tone - surface problems.
The honest caution for this audience: 7 per cent on skin that is dragged over by a blade several times a week is a lot of exfoliation stacked on a lot of abrasion. Start with salicylic, get a couple of months of tolerance, and add glycolic only if the remaining complaint is texture rather than congestion - which is why the toner page names it as a skip for first-timers.
And lactic, which belongs on a body
Lactic acid is water-soluble like glycolic but a larger molecule, so it penetrates less and irritates less. It is also a humectant - it holds water in the skin it just exfoliated.
That combination makes it the body acid rather than the face one: rough, dry skin on arms, legs and heels needs exfoliation and moisture, and lactic does both from one ingredient. The body exfoliant roundup covers it, and AmLactin publishes 12 per cent on the front of the tube.
Using either one without overdoing it
- Two or three times a week to start. Not daily. Over-exfoliated skin looks like under-exfoliated skin, which is how people end up doing more of the thing causing it.
- One acid at a time. Pick the one matching your problem and give it two months before adding anything.
- Never on a shaving day. The blade already exfoliated.
- Moisturize afterwards. Both acids cost you some barrier; put it back.
- Sunscreen the next morning, without exception. Especially with glycolic.
- Six to eight weeks before judging it. Skin turnover is measured in weeks.
Every pick, with the working
Each entry shows the published specifications, the axis scores they produce and what you give up. The order is the computed order, not a commercial one, and the arithmetic is open underneath every score.
Our pickClogged pores and ingrown hairs
Paula's Choice Skin Perfecting 2% BHA Liquid
118 ml of salicylic acid at a published 2 per cent, at a published pH of 3.5, in an eight-ingredient formula. Both numbers matter: a BHA below about pH 4 is doing chemistry and above it is doing very little, and almost nobody in this category publishes their pH at all. Salicylic acid is oil-soluble, so it goes down the follicle - which is why it is the right acid for ingrowns rather than the glycolic most sites recommend.
- Volume
- 118 ml
- Fragrance
- Fragrance-free
- Made in
- United States
- Refill
- Nothing to refill
- Warranty
- Not applicable
- How long it lasts
- 59 uses
Published key ingredients: Salicylic acid 2%, Green tea leaf extract, pH 3.5.
The arithmetic: 118 ml / 2 ml per application (assumed) = about 59 applications.
What it gets right
- Published 2 per cent salicylic acid AND a published pH of 3.5 - the second figure is the rare one
- Eight ingredients total, with the fourth being the active
- Fragrance-free and alcohol-free, both stated on the label
- Oil-soluble acid, which is the mechanism that matters for follicles rather than surface texture
Flaws
- Salicylic acid raises sun sensitivity, so it obliges you to wear sunscreen
- Every-day use is too much for most people starting out
- The texture is a watery liquid that runs, which takes practice on a face
The working behind the 7.8
- How long it lasts: 6.8
- 118 ml / 2 ml per application (assumed) = about 59 applications. At five shaves a week, that is about 2.7 months. A 4-month supply scores 10 in this category, so 2.7 / 4 x 10 = 6.8.
- Ease of switching: 7.0
- Published active concentration and published pH, which together make the chemistry checkable (++), eight-ingredient formula (+), fragrance-free (+), but it obliges daily sunscreen (-) and the runny texture is awkward on a face (-).
- Refill economics: 8.0
- Nothing to refill. The only future cost is replacing the item itself.
- What the maker publishes: 10.0
- 4 of 4 specifications a buyer would expect are published: volumeMl, keyIngredients, fragranceFree, madeIn. 4 / 4 x 10 = 10.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Paula's Choice 2% BHA published concentration, pH and ingredient list.
2Surface texture and dullness, on the body as much as the face
The Ordinary Glycolic Acid 7% Exfoliating Toner
240 ml of glycolic acid at a published 7 per cent and a published pH of about 3.6. Glycolic is water-soluble and works on the surface rather than down the follicle, which makes it the wrong acid for ingrowns and the right one for rough texture - including on the backs of arms and shoulders, where the bottle size finally makes sense.
- Volume
- 240 ml
- Fragrance
- Fragrance-free
- Made in
- Canada
- Refill
- Nothing to refill
- Warranty
- Not applicable
- How long it lasts
- 120 uses
Published key ingredients: Glycolic acid 7%, Tasmannia lanceolata fruit/leaf extract, Aloe barbadensis leaf water, pH approx. 3.6.
The arithmetic: 240 ml / 2 ml per application (assumed) = about 120 applications.
What it gets right
- Published 7 per cent concentration and a published pH of approximately 3.6
- 240 ml, twice the size of most acid toners, which makes body use realistic
- Includes a Tasmanian pepperberry derivative specifically to reduce acid stinging
- Free of alcohol, sulfates and fragrance oils per the published formulation notes
Flaws
- Glycolic acid is a strong photosensitizer; sunscreen stops being optional
- Not the right acid for ingrown hairs - that is salicylic, and the difference is solubility
- The Ordinary explicitly warns against use with other acids or on compromised skin
The working behind the 8.4
- How long it lasts: 10.0
- 240 ml / 2 ml per application (assumed) = about 120 applications. At five shaves a week, that is about 5.5 months. A 4-month supply scores 10 in this category, so 5.5 / 4 x 10 = 10.0.
- Ease of switching: 6.5
- Published concentration and pH (++), 240 ml makes body use practical (+), a named anti-irritant in the formula (+), but strong photosensitization (-) and an explicit maker warning against layering with other acids (-).
- Refill economics: 8.0
- Nothing to refill. The only future cost is replacing the item itself.
- What the maker publishes: 10.0
- 4 of 4 specifications a buyer would expect are published: volumeMl, keyIngredients, fragranceFree, madeIn. 4 / 4 x 10 = 10.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from The Ordinary Glycolic Acid 7% published concentration, pH and ingredients.
3Exfoliating without adding a step
CeraVe SA Smoothing Cleanser
Skip this one. If you have actual ingrown hairs or genuinely clogged pores, this is the weaker choice on the page and CeraVe will not tell you how much weaker, because neither the percentage nor the pH is published. It is the right product for maintenance and the wrong one for a problem.
A salicylic acid cleanser with the three CeraVe ceramides and niacinamide, in 237 ml. It is the lowest-commitment way into chemical exfoliation because it replaces your face wash rather than adding a fourth product, and the ceramides are there to put back what the acid strips. CeraVe does not publish the salicylic acid percentage, which is the honest mark against it.
- Volume
- 237 ml
- Fragrance
- Fragrance-free
- Made in
- United States
- Refill
- Nothing to refill
- Warranty
- Not applicable
- How long it lasts
- 120 uses
Published key ingredients: Salicylic acid (percentage not published), Ceramides NP, AP, EOP, Niacinamide, Hyaluronic acid.
The arithmetic: 237 ml / 2 ml per application (assumed) = about 120 applications.
What it gets right
- Replaces the cleanser you already use rather than adding a step
- Three published ceramides (NP, AP, EOP) plus niacinamide in the same formula
- Full INCI list published; the acid sits alongside barrier ingredients rather than alone
- 237 ml, which is a normal cleanser bottle rather than a treatment-sized one
Flaws
- CeraVe does not publish the salicylic acid concentration, so the strength is unknown
- No published pH either, and for an acid that is the figure that decides whether it works
- A rinse-off acid has far less contact time than a leave-on, so it does less
The working behind the 9.4
- How long it lasts: 10.0
- 237 ml / 2 ml per application (assumed) = about 120 applications. At five shaves a week, that is about 5.5 months. A 4-month supply scores 10 in this category, so 5.5 / 4 x 10 = 10.0.
- Ease of switching: 9.5
- Replaces an existing step rather than adding one (++), ceramides and niacinamide in the same bottle (+), fragrance-free (+), but neither the acid percentage nor the pH is published, so its strength cannot be compared to anything (--).
- Refill economics: 8.0
- Nothing to refill. The only future cost is replacing the item itself.
- What the maker publishes: 10.0
- 4 of 4 specifications a buyer would expect are published: volumeMl, keyIngredients, fragranceFree, madeIn. 4 / 4 x 10 = 10.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from CeraVe SA Smoothing Cleanser published ingredient list.
4The only published acid percentage in the category
AmLactin Daily Nourish Lotion (12% Lactic Acid)
12 per cent lactic acid printed on the front, a twelve-item ingredient list published in full, three published sizes, and fragrance-free, dye-free, paraben-free and phthalate-free stated outright. Lactic acid does two jobs from one ingredient - it exfoliates and it is a humectant - and this is the only body product here that tells you how much of it you are getting.
- Volume
- 234 ml
- Fragrance
- Fragrance-free
- Refill
- Nothing to refill
- Warranty
- Not applicable
- How long it lasts
- 16 uses
Published key ingredients: Ammonium lactate (12% lactic acid), Glycerin, Mineral oil, Dimethicone.
The arithmetic: 234 ml / 15 per whole-body application (assumed) = about 16 applications.
What it gets right
- Published 12 per cent lactic acid - the figure nobody else in this category prints
- Full 12-ingredient list published, and it is short
- Published fragrance-free, dye-free, paraben-free and phthalate-free
- Three published sizes (7.9, 14.1 and 20 oz), so cost per use is actually calculable
- No scrubbing - it works chemically rather than by abrasion
Flaws
- Lactic acid stings on freshly shaved or broken skin
- Mineral oil is third on the list, which some people avoid on principle
- An acid this strength needs sunscreen on anything it is used on that sees daylight
- Takes weeks rather than one application, unlike a scrub that feels immediate
The working behind the 7.2
- How long it lasts: 1.8
- 234 ml / 15 per whole-body application (assumed) = about 16 applications. At five shaves a week, that is about 0.7 months. A 4-month supply scores 10 in this category, so 0.7 / 4 x 10 = 1.8.
- Ease of switching: 9.0
- A published acid percentage plus a published fragrance-free claim removes both unknowns at once (++), three sizes published so cost per use is calculable (+), but it stings shaved skin (-) and needs sunscreen over it (-).
- Refill economics: 8.0
- Nothing to refill. The only future cost is replacing the item itself.
- What the maker publishes: 10.0
- 3 of 3 specifications a buyer would expect are published: volumeMl, keyIngredients, fragranceFree. 3 / 3 x 10 = 10.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from AmLactin Daily Nourish published 12% lactic acid and full ingredient list.
Prices last verified September 24, 2026. They move constantly; the figure on Amazon when you click is the real one.
Questions people actually ask
Which acid should I start with?
Salicylic, for most men. Male skin tends to be oilier and larger-pored, and salicylic is the one that reaches the plug inside a follicle. It is also gentler on skin that gets shaved several times a week.
Can I use both?
Yes, on different days rather than layered. Alternating is how people end up over-exfoliated - start with one, use it two or three times a week for a couple of months, and only add the second if there is a problem the first is not solving.
Why does pH keep coming up?
Because both acids are only active in a narrow pH band. Above roughly pH 4 a salicylic acid is largely inert regardless of the percentage on the front. A product publishing both figures is telling you it works; most publish neither.
What about lactic acid?
Also water-soluble, like glycolic, but a larger molecule so it penetrates less and irritates less - and it is a humectant as well as an exfoliant. That combination makes it the usual choice for dry or rough body skin rather than for a face.
Do I need sunscreen with these?
Yes, and with glycolic especially - AHAs increase sun sensitivity, and that is a label warning rather than a precaution. The sunscreen roundup covers the options.
Can I use an acid on a day I shaved?
No. A blade is already a mechanical exfoliation, and stacking a chemical one on top is how people produce the irritation they were trying to fix. The razor burn page ranks the causes.