So Biologique Recherche got slapped with a class-action over P50’s “pH 3.0” claims, and the internet is clutching its pearls. I’m clutching my bottle because I’ve been slathering this acid cocktail on my face for years.
The suit says the toner’s actual pH swings closer to 4.5—which basically means the “exfoliating power” you’re paying $100+ for is more like a gentle splash than a chemical peel. That’s a big deal when the entire brand identity is built on “correcting” your skin.
P50 is a watery, vinegary-smelling toner that promises glass skin via a proprietary blend of acids. The original 5.0 oz bottle runs $112, and the “P50 1970” version is even stronger—and even more expensive.
The 1970 Formula
Contains phenol—a controversial antiseptic that’s banned in the EU but gives that instant “tight” feeling.
The Standard P50
Still has lactic, malic, and citric acids, but the pH claim is now the elephant in the room.
The Delivery System
It stings. Not in a cute way—in a “is this burning my barrier?” way that fans call “the P50 tingle.”
Photo: frank mckenna / Unsplash
It’s a mix of fruit acids, sulfur, and niacinamide—but the stars are the exfoliating acids. If the pH is off, they’re not doing much beyond mild surface smoothing. The sulfur is the real workhorse here, nuking bacteria and calming redness.
- Lactic Acid: Gentle surface exfoliant, but only if pH is under 4
- Sulfur: Kills acne bacteria and reduces oil
- Niacinamide: Calms inflammation and fades marks
- Malic Acid: Smoother texture, but weak at higher pH
Photo: averie woodard / Unsplash
It smells like pickles and a gym bag had a baby. First swipe? Immediate tingle, then a flush that fades in 5 minutes. Skin feels squeaky—almost too clean.
By week two, my pores looked smaller and my texture was smoother. But I also started questioning if I was just seeing the “tight” effect of over-stripping, not actual exfoliation. The lawsuit made me paranoid—and I started using it every other day instead of daily.
Photo: Laura Chouette / Unsplash
My blackheads on my nose are visibly less. My chin bumps? Still there. The glow is real, but honestly, a $15 glycolic toner from The Ordinary does 80% of the job without the lawsuit drama.
Photo: Curology / Unsplash
P50 is a luxury placebo with a great marketing team. If you’ve got cash to burn and want the “experience,” go for it—but don’t pretend the pH lawsuit doesn’t gut the core promise.