What is propylene glycol and glycerol?
A. Both propylene glycol and glycerol are food additives. They are found in many foods that we eat today. Typically, propylene glycol is used in food coloring, flavoring and it is used to keep food, medicines and cosmetics moist. They are considered to be generally safe and they are the materials in the electronic cigarette flavored replacement filter which are used to create the vapor that simulates the smoke.
