special subjects
Vaping
Ingredients
 ( Reference ). Some people use the vaporizers to inhale active ingredients other thannicotine, including tetrahydrocannabinol (THC), hashish oils, amphetamines, and synthetic cannabinoids. In addition to water and the active ingredient, commercially produced vaping liquids usually contain propylene glycol or vegetableglycerin-based liquid along with flavoring and other chemicals, including trace amounts of metals. Illicitly produced vaping agents likely contain additional inactive ingredients, some of which, such asvitamin Eacetate, may be involved in vaping-related pulmonary complications. 