What it is
Beeswax (Cera Alba) is a natural wax produced by bees to build the walls of their honeycomb.
What it does
Beeswax is a thickening agent. It thickens the oil portion of solid products (like lipsticks), giving them structure and keeping them solid. It stiffens eye makeup products without hardening them. When used in mascaras it provides the main body of the product and gives it smudge-proof and waterproof properties.
It is also an emollient that smooths and softens the skin.
Although rare, allergies to beeswax can occur.
(Source: J Dtsch Dermatol Ges. 2003 Jul)