Get helpful tips and guidance for everything from fighting inflammation to finding the best diets for weight loss...from exercises to build a stronger core to advice on treating cataracts. PLUS, the latest news on medical advances and breakthroughs from Harvard Medical School experts. The page you are looking for may have been removed or is temporarily unavailable. Cannabis used with intention and the right dosage levels provides countless benefits. Gorelick, S. A., & Hermann, R. (2017). Cannabis use and disorder: Epidemiology, comorbidity, health consequences, and medico-legal status. UpToDate. September, 2-150. Cannabis is a flowering plant that has fibrous stalks used for paper, clothing, rope, and building materials; leaves, flowers, and roots used for medicinal purposes; and seeds used for food and fuel oil. Cannabis leaves and flowers are consumed in several forms: dried flower buds or various types of concentrated, loose, or pressed resin extracted from the flowers or leaves through a variety of methods. Once mature, the plant’s leaves and flowers are covered with trichomes, tiny glands of resinous oil containing cannabinoids and terpenes that provide physical and psychoactive effects.