How Can Ingredients In E-Liquids Be Dangerous To Inhale, Even If The Food And Drug Administration Deems Them Generally Recognized As Safe?. Food & drug administration (fda) published an established list of 93 harmful and potentially harmful constituents (hphcs) targeting four tobacco product types. Propylene glycol and vegetable glycerin, nicotine, and flavorings.

Research has demonstrated that flavoring agents can induce inflammation, endothelial dysfunction, epithelial barrier disruption, oxidative stress, dna damage, electrophysiological. Propylene glycol and vegetable glycerin, nicotine, and flavorings. Food & drug administration (fda) published an established list of 93 harmful and potentially harmful constituents (hphcs) targeting four tobacco product types.