There is a particular kind of French pharmacy product that you only discover by wandering into a parapharmacie on holiday, squinting at a green-and-white tube, and walking out with something your dermatologist back home has never mentioned. Ducray's Keracnyl Foaming Gel is exactly that genre of find. It sidesteps the salicylic-acid arms race that defines most acne cleansers and instead leans on the brand's house specialty: Myrtacine, a patented complex derived from myrtle leaf, paired with a zinc-bearing surfactant and a dash of saw palmetto. It is an acne wash with a philosophy, and that philosophy is worth examining honestly.
Start with what it actually is. This is a soap-free foaming gel built on zinc coceth sulfate as its primary surfactant, softened by lauryl betaine and decyl glucoside — the gentle, sugar-derived co-surfactants that have quietly become the backbone of well-formulated modern cleansers. The result is a clear gel that whips into a light, soft foam and rinses away cleanly. The zinc coceth sulfate is the clever part: it both cleanses and carries zinc, a mineral with a long, credible reputation for nudging sebum production in a calmer direction. That is a smarter design than simply throwing a strong detergent at oily skin and hoping for the best.
The sensory experience is reassuringly low-drama. The foam is controllable rather than billowy, the kind that lets you actually work the product over your T-zone without it collapsing or running everywhere. After rinsing, skin feels clean and faintly matte but not stripped — there is no squeaky, taut, please-moisturize-me-immediately sensation that older acne foams were notorious for. That restraint is the whole point. People with oily, breakout-prone skin tend to over-cleanse, which compromises the barrier and ironically triggers more oil and more irritation. A wash that degreases without scorching the earth is genuinely useful for breaking that cycle.
Formulation-wise, the honest caveats live in two ingredients. First, there is parfum fairly far down the list. It is a light, pleasant fragrance that vanishes on rinsing, and most people will never have an issue with it, but anyone with truly reactive or fragrance-sensitive skin should take note — this is not a fragrance-free formula, and it should not pretend to be. Second, the zinc coceth sulfate is a sulfate-class surfactant. It is far gentler than the SLS of cleansing-bar infamy, but it is still a more assertive detergent than a pure glucoside system, which is why drier complexions can feel a hint of tightness afterward. Neither of these is a dealbreaker for the target user; both are reasons it is not a universal cleanser.
Now, the hero ingredients. Myrtacine is Ducray's signature, and the brand markets it as an antibacterial, anti-inflammatory active that helps rebalance the acne-prone microbiome. The botanical research behind myrtle extract is real but early — most of it is laboratory and in-vitro work rather than large clinical trials, and in a rinse-off product the contact time is short. Saw palmetto carries a similar story: it has a folk and supplement reputation as an anti-androgen that moderates oil, but the evidence for topical, wash-off use is thin. I would not buy this gel expecting either of these to clear acne on their own. Think of them as supporting actors that shape the oily-skin environment, while the real heavy lifting in any acne routine comes from your leave-on treatment.
That reframing is the key to using it well. As a standalone product, it is a very good cleanser and a mediocre acne treatment, because it is, fundamentally, a cleanser. Slot it in as the first step of a routine that also includes a BHA, an adapalene, or a prescribed retinoid, and it earns its place by keeping skin clean and calm without sabotaging the actives doing the work. Used that way, the Myrtacine-and-zinc angle becomes a genuine asset: it lets blemish-prone people wash twice a day without the over-stripping that derails so many acne routines.
Value is reasonable for what it is. At roughly fifteen to twenty dollars for 200 ml, it sits in the comfortable middle of the pharmacy-cleanser bracket — more than a basic drugstore wash, less than a boutique cleanser, and a 400 ml size exists for better per-millilitre economy if you commit. You are paying a modest premium for Pierre Fabre's research pedigree and the proprietary complex, which feels fair rather than inflated. The main friction is availability: in the US it lives mostly with importers and resellers rather than on big-box shelves, so factor in shipping and the occasional hunt.
The bottom line is a product that knows exactly what it is. It will not transform your skin, and it makes no honest claim to. What it does is cleanse oily, congested skin gently and effectively while gesturing at sebum control through its mineral and botanical actives. For someone with oily or combination skin who wants a daily wash that plays well with a real acne treatment, it is an easy, low-risk recommendation. For dry, sensitive, or fragrance-averse skin, the very features that make it work for its target audience are the reasons to look elsewhere.
