Teenagers are very familiar with the risks of smoking cigarettes, but are much less sure whether marijuana or e-cigarettes are harmful, according to a new study by researchers at the Stanford ...

Teen marijuana use is rising as legalization spreads. Explore how cannabis affects brain development, mental health, and long-term adolescent health risks.

Adverse health effects as a result of increased synthetic marijuana use are on the rise, the Centers for Disease Control and Prevention reported on Thursday. According to the CDC's Morbidity and ...

Forbes contributors publish independent expert analyses and insights. Dr. Omer Awan is a practicing physician who covers public health. Despite the growing trend of legalizing marijuana across the ...

New research published in the European Journal of Preventive Cardiology yesterday states that the use of marijuana is linked with a three-fold risk of death due to ...

Add Yahoo as a preferred source to see more of our stories on Google. A recent study of dead drivers in an Ohio county found that 42 percent were positive for THC, the intoxicating chemical in ...

The rising numbers of adverse effects occurring in the wake of legislative reform of marijuana are disturbing. But they are ...

What does this all mean? Marijuana may increase testosterone in the short term, but more research is needed to understand the long-term effects. Does marijuana use lower levels of testosterone?

A new study from medical researchers at Harvard and Northwestern shows that 18- to 25-year-olds who smoke marijuana—even just recreationally!—had marked abnormalities in areas of their brains that reg ...

Legalization of medical marijuana may reduce the instances of opioid use in adults under 40 years of age, a new study analyzing traffic accidents has suggested. Published Thursday in the American ...

In another review that looked at the effects of marijuana use on male fertility, researchers didn’t find a clear link between cannabis and hormonal imbalances. But there was some evidence that ...