The arrival I posted actual is rebuking that "study" because it ignores the amount of diacetyl that is in cigarettes. Toxcicity of a compound is based on dose. The dose of diacetyl in ejuice is so small it's benign. Cigarettes have more diacetyl than any ejuice ever produced. Continue to only use menthol juice for all I care. If it works for you, good. I don't understand why you are hellbent in backing up something that isn't true.