Abstract
The distribution of 14C-menthol (U) and its combustion and pyrolytic products in cigarette smoke is described. The mainstream smoke contains 28.9 percent of the total activity with 44.3 percent in the sidestream smoke and 26.9 percent in the butt. The major 14C-menthol smoke product in the mainstream smoke is unchanged menthol (98.9%). A puff-by-puff plot of menthol delivery is presented. The results obtained are explained hypothetically