Guaiazulene is a naturally derived blue hydrocarbon related to azulene, used in cosmetics as a color additive. It gives a blue tone, offsets yellowish tints in formulas, and cues calming-themed positioning in after-sun and sensitive lines.
A naturally derived blue pigment used to signal a calming, soothing feel.
Category
Color, Soothing
Type
Colorant
Ratings
Overall Rating
Fair
Comedogenic Risk
None
Not typically evaluated for comedogenicity — no standardized rating available.
Our take
Is Guaiazulene a Good Ingredient?
It's Fair because it imparts a blue hue and may provide modest soothing, but the modern clinical support for the soothing claim is limited, and it carries a known sensitization risk in some users, which keeps the rating moderate.
What it does
Skin Benefits
Lends a cool blue hue that visually signals a calming experience and can help neutralize warm tints in formulas. Any soothing effect on skin is considered modest, with limited clinical support in modern leave-on products.
Where you'll find it
Uses in Skincare & Cosmetics
Seen in post-sun lotions, aftershave balms, and blue-tinted face creams to balance color. Also used in gel masks and serums where a blue tone is desired without staining the skin.
Before you use it
Safety
Usually used at low levels, but it can cause irritation or contact dermatitis in sensitive skin. Avoid use on compromised skin if irritation develops.