3. Diacetyl: is it hazardous?
Diacetyl is declared safe by the Food and Drug Administration, but only as a substance. What about vaporing of this substance? Vapors love its taste, but when they became aware of the health risk this substance carries five years ago, many manufacturers of e-cigarettes had to remove diacetyl from the liquids. If you are worried about diacetyl in e-cigarettes, you should buy diacetyl-free liquids or just smoke unflavored liquids.
