Gluconolactone and salicylic acid: the exfoliating duo for sensitive, blemish-prone skin

When it comes to exfoliants, everyone knows about glycolic acid and salicylic acid. But few people are familiar with gluconolactone—and that’s exactly why it’s so powerful for your skincare routine. Here’s an honest explanation of these two active ingredients, how they differ, and why combining them in a single cleanser is a scientifically superior approach.

PHAs: The Evolution of Traditional AHAs

PHAs (polyhydroxy acids) represent the third generation of exfoliating acids. Among them, gluconolactone is the most clinically studied PHA.

Like AHAs, it gently exfoliates the skin and promotes cell renewal. However, because its molecules are larger, it penetrates less deeply into the skin, which significantly reduces the risk of irritation. It also has a unique property in its category: it is humectant, meaning it draws water into the skin during exfoliation to preserve skin hydration.

Salicylic acid: the ultimate pore-minimizing ingredient

Salicylic acid is a fat-soluble BHA that can penetrate deep into pores—which are naturally rich in lipids—to dissolve impurities from within. It is the gold standard active ingredient in dermatology for treating blackheads, whiteheads, and mild to moderate acne.

In a cleanser, concentrations ranging from 0.5% to 2% are generally effective and well tolerated for daily use.

Why use them together?

Gluconolactone and salicylic acid work at different levels and complement each other perfectly. Gluconolactone works primarily on the skin’s surface: it improves skin texture, refines the complexion, and maintains hydration. Salicylic acid works deeper within the pores to unclog, purify, and reduce excess sebum.

Together, they provide a thorough exfoliation—both on the surface and deep within the pores—without the irritation often associated with stronger acids. This synergy is at the heart of our Ritual 01—Biomimetic Purifying Cleanser.

What skin types is it suitable for?

This combination is particularly suitable for combination to oily skin prone to breakouts, sensitive skin that does not tolerate traditional AHAs well, and acne-prone skin that requires effective yet gentle exfoliation.

How do you use them correctly?

When used in a cleanser, these active ingredients can be applied morning and night without any special restrictions, as rinsing off the product limits its absorption and thus reduces the risk of irritation.

One rule remains essential, however: apply sunscreen in the morning, just as you would with any exfoliating product.