PG (Propylene glycol)

Propylene glycol (PG) is a synthetic liquid substance that is colorless and odorless. It is commonly used as a food additive, in pharmaceuticals, and in cosmetics due to its ability to retain moisture. PG is recognized as safe by various health organizations, which categorize it as "generally recognized as safe" (GRAS) when used in food products. It acts as a humectant, helping to keep things moist, and also serves as a solvent for flavorings and medications. Its versatility and safety profile make it a popular choice in many industries.