Naturium AHA Exfoliating Mask 10% Review

Most masks tell you what they contain. Very few tell you how much, and almost none tell you the pH, which for an acid is the number that decides whether the percentage means anything. Naturium's AHA Exfoliating Mask 10% prints both: 5 percent glycolic plus 5 percent lactic acid on the jar, pH 3.5 to 4 on the page. That is the disclosure of a serum brand, not a mask brand, and it is the most useful thing about the product before it is even opened, because it tells a buyer exactly what they are dealing with — a genuinely active acid, calibrated for a five-minute contact — and lets them decide whether their skin is up to it.

Naturium is the accessible-actives company founded in 2019 and owned by e.l.f. Beauty since 2023, and its reputation rests on precisely this habit: disclosed concentrations on leave-on acids and retinoids at Target prices. By 2024 it had a 2 percent BHA liquid, a 12 percent mandelic and a 10 percent glycolic gel in the range, and what it lacked was a weekly rinse-off — something that could go harder for a few minutes on a Sunday night and then get out of the way. The AHA Exfoliating Mask arrived in September 2024 to fill that slot, borrowing the clay-and-rice-powder format of wash-off masks and the transparency of the brand's serums.

The formula reads sensibly from top to bottom. Water, then kaolin second and bentonite fifth — the clay pair that turns an acid into a mask, absorbing surface oil while the acids work. Butylene glycol and glycerin sit between them so the clay never dries rigid. Dicaprylyl carbonate adds slip. Then the acids: lactic seventh, glycolic eighth. The order matters; lactic is the larger, gentler, humectant acid, and leading with it means the 10 percent skews toward tolerability rather than bite. Potassium hydroxide follows to set the pH. Further down, rice powder gives a faint physical polish during the massage, lipase and protease add a nominal enzymatic note, biosaccharide gum soothes, and a sodium levulinate–anisate system preserves without parabens. No fragrance, no essential oils, no alcohol beyond a trace of t-butyl alcohol as a carrier.

In use it is a five-minute event with a clear arc. The clay cream spreads easily over the face, neck and chest, tingles within a minute — a light, even prickle rather than a burn on skin that is intact — and never sets hard. At five minutes it rinses with a little massage, the rice powder giving a last polish, and the skin underneath is immediately smoother, slightly matte from the clay, and by bedtime visibly brighter, often with a faint pinkness that fades within the half hour. Over three or four weekly uses, the T-zone is less congested, texture is finer, and makeup sits better. Tone evens a little over two or three months, as it does with any regular exfoliation. That is the full extent of the promise, and the product meets it.

It is also, and this bears repeating, an acid. Ten percent at pH 3.5 to 4 is active enough that freshly cleansed, still-damp skin will tingle harder than dry skin, that a barrier already thinned by a retinoid or a leave-on acid will sting rather than prickle, and that rosacea-prone or eczema-prone faces should not be near it. Naturium's five-minute ceiling is not a suggestion; the brand's own note that the mask suits acne-prone, dry, ageing and combination skin is fair only if 'sensitive' is read as absent from that list, which it is. Used on the wrong night — after a retinoid, before a peel, on sunburn — it will produce exactly the redness that gives acids a bad name. Used on its own night, once or twice a week, with a hydrating serum and a plain moisturizer afterward and sunscreen the next morning, it is one of the better-behaved acid masks at any price.

The practical complaints are small. A jar invites fingers into a clay formula, so a spatula is wise, and clay lingers in the creases of the nose and along the hairline and needs a second rinse. The 50 mL jar is generous for the face alone — about three months of weekly use — and modest if the neck and chest are included every time. The physical rice powder is so fine that some users will not notice it, which is fine, and the enzymes are more label than effect in a five-minute rinse, which is also fine; the acids do the work.

On value, twenty dollars for 50 mL is forty cents a millilitre, and a weekly dose costs well under a dollar. Rinse-off acid masks with comparable disclosed strength from dermatology-adjacent brands run three to four times that, often with fragrance. Naturium's seven years and e.l.f.'s manufacturing scale add reliability without a research premium, and none is charged — there is no clinical trial, only a dermatologist tolerability panel and the honesty of the label.

The recommendation is easy for the right skin. Combination, oily and normal skin that wants a weekly reset — smoother texture, clearer pores, an instant glow — without fragrance and without a daily acid commitment will find this a small, dependable pleasure, and the numbers on the jar mean nobody is guessing. Dry skin can join in once a week with a good moisturizer waiting. Sensitive, reactive and barrier-damaged skin should take the pH at its word and choose a gentler evening.