THC

Humans have been cultivating the cannabis plant for thousands of years, but we know very little about when it was first used for its psychoactive properties.

A coroner in Louisiana believes he may have investigated the first recorded case of a THC overdose.

"Consumers need to know that cannabis products can be impairing. If someone is feeling the effects of cannabis, they should not drive," the study co-author told Newsweek.

"The study opens our eyes to the hidden effects of cannabis," said the lead author of a new study.

As legal Canadian and U.S. weed companies see soaring profits and investment, many governments are noting the plant's lucrative potential.

"They had stomach aches, they were nauseous, dizzy. One of them was all but passed out."

Perrottetinene is believed to light up the same parts of the brain as the psychoactive ingredient in cannabis.

THC, the psychoactive ingredient in cannabis, could loosen parts of the brain linked to pain.

A single dose of cannabidiol was found to ease brain abnormalities in people with psychosis.

Dispensary workers are trained to tell customers to take health questions to a medical professional.

The snack was laced with THC.

A new meta-analysis found that heavy pot use may not impact the brain long-term.

Cannabis might reduce pain but not by a lot, and not by much more than a placebo.

Growers are cultivating strains that cause psychosis and memory loss.

Since Colorado first legalized recreational marijuana in 2012, the demand for novelty, even gourmet, products containing THC has soared

Ingesting marijuana cuts down on the carcinogens but it's harder to control the high.

When will we see daily guidelines for marijuana use like those for alcohol?

A substance with many names—K2, spice, synthetic marijuana—ropes in users by comparing itself to cannabis, but it's infinitely more unsafe.

Significant obstacles discourage pharma companies from devoting the power needed to develop a patentable drug to take the plant's place.

Pot legalization is opening the door for a foodie culture and cannabis collision.

Researchers argue that marijuana should be subject to the same FDA approval process as any other drug.

Mostly, that we were right about weed back in 1993—it's not great for you.