Marijuana is a psychoactive plant product made from the dried flowers, leaves, and stems of the Cannabis sativa plant. Its main intoxicating compound, THC, is responsible for the “high” that users experience.

Where Does Marijuana Come From?

Marijuana comes from Cannabis sativa plants that are carefully cultivated to produce high levels of tetrahydrocannabinol (THC). The plant contains over 100 other compounds called cannabinoids, including CBD, which does not cause a high by itself. Hemp, by contrast, is a Cannabis sativa variety with THC levels below 0.3%, and it is not considered marijuana.

How Does Marijuana Affect the Brain and Body?

When marijuana is inhaled or swallowed, THC rapidly travels through the bloodstream to the brain. There it binds to cannabinoid receptors, triggering feelings of euphoria, relaxation, altered senses, and an increased appetite. It can also impair short-term memory, judgment, and motor coordination. The intensity and duration of these effects depend on the strain, dose, method of use, and an individual’s tolerance.

What Are the Health Considerations?

Some clinical studies suggest that marijuana may help treat certain medical conditions, including chronic pain, nausea from chemotherapy, and severe muscle spasticity. However, the FDA has not approved the whole marijuana plant as a medicine, and many potential benefits are still under investigation. Smoking marijuana can irritate the lungs, and high-THC products may raise the risk of anxiety, paranoia, or cannabis use disorder.

Common Ways to Consume Marijuana

The most traditional method is smoking dried flower in a joint, pipe, or bong. Vaping flower or concentrates is also popular, and edibles such as gummies and baked goods provide a longer, more intense experience. Tinctures that are placed under the tongue and topical creams are non-inhalation options that allow users to control their intake with more precision.

Marijuana Laws in the United States

The legal status of marijuana varies widely in the U.S. Federally, the DEA classifies it as a Schedule I substance, which means the government considers it to have a high potential for abuse and no accepted medical use. At the same time, a growing number of states have approved medical marijuana programs, and others permit fully legal adult recreational use. Because state and federal rules conflict, consumers must check current local laws before purchasing or consuming marijuana.