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Close up of a Cannabis plant. Cannabis (/ˈkænəbɪs/) is commonly known as marijuana or hemp and has two known strains: Cannabis sativa and Cannabis indica, both of which produce chemicals to deter herbivory. The chemical composition includes specialized terpenes and cannabinoids, mainly tetrahydrocannabinol (THC), and cannabidiol (CBD ...
Hashish is a cannabis concentrate product composed of compressed or purified preparations of stalked resin glands, called trichomes, from the plant. It is defined by the 1961 UN Single Convention on Narcotic Drugs (Schedule I and IV) as "the separated resin, whether crude or purified, obtained from the cannabis plant".
Cannabis and cancer risk. The cannabis plant contains more than 100 cannabinoids, including THC and CBD, and hundreds of non-cannabinoid chemicals. Scientists are just beginning to understand the ...
Cannabis began to attract renewed interest as medicine in the 1970s and 1980s, in particular due to its use by cancer and AIDS patients who reported relief from the effects of chemotherapy and wasting syndrome. [91] In 1996, California became the first U.S. state to legalize medical cannabis in defiance of federal law. [92]
Youth cannabis use has dropped since legalization. A Youth Health Survey from 2021 found that marijuana use decreased dramatically for high school students in 2021. About 30% had used marijuana ...
A 2012 review of cannabis use and dependency in the United States by Danovitch et al said that "42% of persons over age 12 have used cannabis at least once in their lifetime, 11.5% have used within the past year, and 1.8% have met diagnostic criteria for cannabis abuse or dependence within the past year. Among individuals who have ever used ...
Causes of head and neck cancers. In the United States, head and neck cancers make up 4% of all cancers, with more than 71,000 new cases and more than 16,000 deaths expected in 2024, according to ...
Cannabis (/ ˈ k æ n ə b ɪ s /) [2] is a genus of flowering plants in the family Cannabaceae that is widely accepted as being indigenous to and originating from the continent of Asia. [3] [4] [5] However, the number of species is disputed, with as many as three species being recognized: Cannabis sativa, C. indica, and C. ruderalis.