Ask the Chatbot Games & Quizzes ProCon History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
marijuana
Related Questions
Discover
CanniMed crop of medicinal marijuana. (cannabis sativa) Prairie Plant Systems Inc. is Health Canada's contracted manufacturer of medicinal marijuana.
The Dope on Dope: 8 Facts About Marijuana
Close-up of marijuana plant growing outdoors
Why Is Marijuana Illegal in the U.S.?
Hand washing. Healthcare worker washing hands in hospital sink under running water. contagious diseases wash hands, handwashing hygiene, virus, human health
17 Questions About Health and Wellness Answered
Woman Smoking Marijuana In Plantation
Pro and Con: Recreational Marijuana
Artwork for themes for Pro-Con articles.
Pro and Con: Medical Marijuana
Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint
8 of the Largest Empires in History
Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that
America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)
marijuana Article

What is the active ingredient in marijuana?

verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

External Websites
Written and fact-checked by
The Editors of Encyclopaedia Britannica
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
The Editors of Encyclopaedia Britannica

Tetrahydrocannabinol (THC) is the active ingredient present in all parts of both the male and female marijuana plants, but it is most concentrated in the resin (cannabin) in the flowering tops of the female plant. It was first isolated from the Indian hemp plant (Cannabis sativa) and synthesized in 1965.

Related Questions