2,3-Butanediol
A multifunctional glycol. It hydrates and boosts preservative action. Well tolerated.
Evidence by route
Topical application
A functional humectant. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
2,3-Butanediol (INCI: 2,3-Butanediol) is a multifunctional glycol. In a formula it hydrates by holding water, improves feel and reinforces the preservative system, helping other preservatives work at lower doses. It combines functional roles: a supporting humectant and a preservation booster. It is not an active that corrects wrinkles or pigmentation; it gives the formula comfort and stability. Topically its systemic relevance is negligible, so it can be used during pregnancy and breastfeeding without restriction. Tolerance is good. Irritation and allergy potential are low, suitable for sensitive skin. Glycols of this type rarely cause problems, are not linked to clogged pores, and in most people cause no reaction.
Frequently asked questions
Is 2,3-Butanediol safe during pregnancy?
2,3-Butanediol is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is 2,3-Butanediol for?
2,3-Butanediol suits: normal, dry, combination, oily, sensitive.
What is 2,3-Butanediol and what does it do in cosmetics?
A multifunctional glycol.
What's the INCI name for 2,3-Butanediol?
The INCI name is 2,3-Butanediol.
See 2,3-Butanediol in a product composition right on the store page
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