Four acids and forty seconds. That is the arithmetic of this cleanser, and it is the right place to start, because the label's multi-acid promise, AHA, BHA, PHA and LHA in one foam, invites a reader to expect the kind of exfoliation that only a leave-on delivers. Salicylic acid sits tenth in the list, behind the preservative; capryloyl salicylic acid, lactobionic acid and citric acid are further down still, and tromethamine near the end buffers the lot to a skin-friendly pH. Then the whole thing is on the face for the length of a lather and a rinse. What survives that is a gentle nudge to surface sebum and the tops of clogged pores, which is worth having, and nothing that will change an inflamed breakout. Benton's AC line has never pretended to be strong, and the honest description of this product is a mild daily wash for oily skin with an exfoliating accent.
Judged on those terms, most of it is well done. The surfactant system is the quiet star: sodium cocoyl alaninate, an amino-acid surfactant, leads, with coco-glucoside and an amphoteric cocoamphodiacetate beside it and a little potassium cocoate soap for the dense lather Korean foams are expected to produce. That blend is why the after-feel is clean rather than squeaky, and why acne-prone skin, which tends to answer a stripping wash by making more oil, does not rebound. Glycerin and dipropylene glycol high in the list and three weights of hyaluronic acid lower down keep the rinse soft. The few reviews that exist say what the list predicts: rich foam, no tightness, a less shiny T-zone by the end of the first week, and little visible effect on active spots.
Of the four acids, the two salicylates are the ones doing anything. Plain salicylic acid is oil-soluble enough to loosen sebum in the brief contact it gets; capryloyl salicylic acid, the LHA, is more lipophilic still and clings to the oily lining of a pore a little better, which makes it the acid most likely to survive the rinse. Lactobionic acid and citric acid, the PHA and AHA, are large or water-loving molecules that stay on the surface and at these levels behave as humectants and pH adjusters, which is fine, and which is also why they belong on the label more than in the mechanism. Benton does not print a salicylic percentage, and the list position puts it well under the two percent of a treatment cleanser.
The soothing set is Benton's usual: heartleaf mid-list, the brand's fermented seven-part centella complex in the lower half, allantoin and licorice. In a rinse-off they are a courtesy to inflamed skin rather than an anti-inflammatory dose, and a reader should not buy the cleanser for them. What a reader should notice, and what the brand's gentle reputation makes easy to miss, is the pair of essential oils near the tail: tea tree and rosemary leaf oil. They give the foam its distinct herbal, faintly medicinal smell, and they are the reason this is not a fragrance-free product despite having no added perfume. Tea tree has genuine acne evidence at around five percent in leave-on products, which this is nowhere near; here it is a scent with a sensitisation risk attached, and rosacea-prone or reactive skin, the audience a mild acid foam might otherwise serve well, is the skin most likely to object.
That is the formula's one real misjudgement, and it narrows the audience. Oily and combination skin without a history of reacting to essential oils will find this a comfortable, effective daily wash. Dry or sensitive skin will find the acids and oils together more than a cleanser needs to carry, and Benton's own plain foaming cleansers, which have neither, are the better fit; anyone whose acne is inflamed rather than congested needs a leave-on treatment and can use any gentle wash underneath it.
One practical point about how to get the most from it. Because the acids are so briefly in contact, the thirty seconds you spend lathering is the whole treatment window, so it is worth foaming it fully in the palms first and then working it over the nose, chin and jawline for the full half-minute rather than rinsing on contact; in the evening, a cleansing oil beforehand takes off the sunscreen and lets the foam spend its short time on skin rather than on residue. That will not turn it into a treatment, but it is the difference between the acid accent doing something and doing nothing.
The price deserves a plain word. Twenty-two dollars for 120 mL is treatment-cleanser money, and resellers list it anywhere from sixteen to twenty-three, which suggests the list price is aspirational. What you are paying for is a very good surfactant base and a low-dose acid accent, and a plain amino-acid foam of the same quality costs less; a tube lasts around three months at twice a day, which softens the maths without changing it.
Benton has been making short, careful formulas since 2011, and this one is in character in its gentleness and out of character in its oils. Buy it if you have oily, congestion-prone skin, like a herbal scent and want a daily wash that will not strip you; read the last third of the ingredient list first if your skin is reactive, and do not expect four acids in a foam to do the work of one acid in a toner.
