Not to ruin your high, but habitually smoking marijuana has been known to take a toll on the body. It can irritate the lungs, ...

Marijuana is far from a “silver bullet” for various illnesses, but it has some promising applications, scientists say ...

Subscribe to The Post Most newsletter for the most important and interesting stories from The Washington Post. Marijuana use seems to be more popular (or at least more openly talked about) than ever.

Though some say weed can improve mood and energy, there are negative effects on cognitive skills — especially in younger ...

In part one of what marijuana really does to your brain, we traced the discovery of the cannabinoid receptor. Finding the receptor is the first step in determining how smoking causes a high. The next ...

Marijuana is made from the shredded and dried parts of the cannabis plant, including the flowers, seeds, leaves, and stems. It’s also known as pot, weed, hash, and dozens of other names. While many ...

SAN DIEGO — A new UC San Diego study strengthens the growing body of evidence that marijuana use impacts adolescent brain development. Researchers observed slower gains in cognitive tests that ...

Dr. Francesca Filbey, a professor of psychology at the University of Texas at Dallas, has studied the effects of cannabis on the human brain for more than a decade. Her work focuses on the underlying ...

If you’re reading this post, you are probably aware that your brain makes its own marijuana. In fact, it may make five different molecules that mimic the actions of marijuana; one is called anandamide ...

Much has been learned since the publication of the 1982 Institute of Medicine (IOM) report Marijuana and Health.* Although it was clear then that most of the effects of marijuana were due to its ...