4-Ethylresorcinol

This synthetic phenolic derivative works as a tone-evening agent and antioxidant in cosmetic formulations. It's chosen for routines addressing uneven-looking pigmentation and dullness, though the evidence behind it is moderate and it can irritate some users.
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Ingredient Snapshot

Overview
Fades the look of dark spots and evens out skin tone over time.
Category
Brightening, Hyperpigmentation, Antioxidant
Type
Skin Brightening

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Helps reduce the appearance of dark spots and uneven tone via tyrosinase inhibition; can improve overall brightness with consistent use.

Uses In Skincare & Cosmetics

Common in brightening serums, spot treatments, and moisturizers aimed at discoloration. Also appears in night creams or ampoules designed to boost overall luminosity.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Generally considered safe in leave-on cosmetics at typical low levels, but it carries an irritation risk for sensitive or over-exfoliated skin. Patch test first and avoid use on compromised skin. Discontinue if persistent redness or stinging occurs.

Is 4-Ethylresorcinol a Good Ingredient?

Rated Good: Supported by in vitro and clinical data as an effective brightening agent at cosmetic levels, though irritation is possible for sensitive skin.

Products with 4-Ethylresorcinol

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