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According to research from a blind study at University College London, nicotine-dependent subjects who were given CBD reduced cigarette usage by 40%, while those who took placebos noticed no difference

The most likely answer for the clue is LEAF

In fact, another report, published just weeks before the ICCPUD's, found that people who drank "moderately" (here, meaning one drink a day or less for women, two or fewer for men) were less likely to die of any cause than those who didn't drink at all

The name Cohiba is an old word used by the Tano Indians, original inhabitants of the Island, to define the rolled tobacco leaves that these Indians smoked, and that Christopher Columbus saw for the first time in Cuba in 1492

NASEM (National Academies of Sciences, Engineering, and Medicine)