Cannabis was linked to increased brain volume in a new study, but researchers urge caution, as findings contradict previous research on marijuana's effects.

Back in the 1960s, the THC content of cannabis was about 3 to 4%. In 2018 it was closer to 18%. But now you can go to a dispensary in Connecticut or elsewhere and buy cannabis that is 35% THC .

The largest fMRI study to date finds that heavy cannabis use in young adults reduces brain activity and impairs working memory performance.

A recent study found that people may perceive fewer negative effects of alcohol if they are also using cannabis at the same time. Many young adults drink alcohol and use cannabis together, at the same ...

Cannabis has changed in recent decades. The concentration of d-9THC, the main psychoactive component, has increased from ...

According to an ongoing study led by UW professors Christopher Simpson and Coralynn Sack, there is mounting evidence to support the idea that exposures to dust and other plant particles in marijuana ...

A study of 26,000 older adults finds that moderate cannabis use is associated with larger brain volumes and better memory, attention, and processing speed.

NEW YORK (PIX11) — Ever since the use of recreational marijuana was legalized in New York and many other parts of the country, greater numbers of people have turned to regular use of the weed. For ...

A new study published in Translational Psychiatry suggests that chronic cannabis use may not be associated with cognitive ...

In a new op-ed, The New York Times admits legalization may have gone too far, citing addiction, mental health risks and rising THC levels. Doctors weigh in on the issue.

The two main compounds in cannabis are in a constant balancing act. This is an Inside Science story. (Inside Science) -- Many people who use cannabis do it for the euphoric effects caused by the main ...