Aside from drawing moisture to the skin, butylene glycol is also an emollient. It coats the skin’s surface, creating a barrier that prevents water loss. It also conditions and softens the skin and hair. Butylene glycol is an organic alcohol, or diol, derived from distilled corn, petroleum, and sugarcane. It is a colorless, viscous, water-soluble liquid that many manufacturers add to skin care products.

Butylene glycol also acts as a stabilizer, preventing active ingredients and volatile compounds from losing their flavor and aroma. Moreover, it prevents products from crystallizing and drying out.

Safety: The Food and Drug Administration (FDA) considers it safe as a food additive.