Propylene glycol

Propylene glycol is commonly used as a food additive. It helps preserve moisture as well as dissolve colors and flavors. It is also used in some medications, cosmetic products, antifreeze and other industrial products.
Since propylene glycol has numerous properties potentially beneficial to packaged foods, its use is quite common in food products designed to have a long shelf life. The Food and Drug Administration (FDA) says propylene glycol is “generally recognized as safe” for use in foods, pharmaceuticals and cosmetics.