“Even though this product smells like vinegar, people have been drawn to it for over four decades because it’s an amazing exfoliant,” Dr. Geria says. “The craze is also over its anti-inflammatory and anti-acne properties — not to mention, it contains lots of natural, uncommon ingredients like onion and horseradish extract.” Alpha-hydroxy acids (AHAs) and beta-hydroxy acids (BHAs) dissolve dead skin cells on contact, but what really makes P50 stand out? “It also contains ingredients that replenish hydration, strengthen the skin barrier, and balance the skin’s pH,” Dr. Sejal Shah, the founder of SmarterSkin Dermatology, tells The Zoe Report.

Granted, this much-loved formula can be a little harsh, so the original version isn’t recommended for acid newbies. “The line comes with several different versions for sensitive or beginner skin, like P50 V,” Dr. Zeichner says. Want to try it for yourself? The exclusive French brand only sells through its spa affiliates, so sign up for a (free) account on Rescue Spa to place an order.