Drinking several cups of coffee daily appears to reduce the risk of suicide in men and women by about 50 percent, according to a new study by Harvard School of Public Health researchers. The study was published online July 2, 2013, in The World Journal of Biological Psychiatry. “Unlike previous investigations, we were able to assess association of consumption of caffeinated and non-caffeinated beverages, and we identify caffeine as the most likely candidate of any putative protective effect of coffee,” said lead researcher Dr. Michel Lucas, research fellow in the department of nutrition.