This is your brain on marijuana

The effects of marijuana on the human body are still debated, and anecdotal effects of marijuana use, including euphoria, relaxation, paranoia, memory loss, and hunger, vary among users depending on duration, dosage, and method of use. THC crosses the blood-brain barrier and acts on cannabinoid receptors, which are present in high quantities in areas affecting pleasure, memory, concentration, coordination, and sensory and time perception. Most effects of use are short-lived, but chronic use prolongs the effects for days or weeks after THC has left the bloodstream. The reversibility of long-term effects is unclear.

Marijuana has effects on neurotransmitter uptake, cerebral blood flow, and brain structure, some of which have been inconclusive in research. Read more about the questionable and known effects of weed on the brain.

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