Propylene Glycol in E-Cigs

As a humectant, propylene glycol keeps cosmetics, hair and skin care products, and food items moist and extends their shelf life. Propylene glycol (PG) is a common ingredient in pharmaceutical products, including oral, topical and injectable formulations. It's a major component of oil-based fragrances, massage oils, antibacterial lotions, saline eye drops, food colors and flavorings, deodorant sticks, mouthwashes and toothpastes.