Here’s a look at some of the top medical cannabis studies from this past year.

Cannabis a powerful weapon against the opioid epidemic. 

According to the International Journal of Drug Policy released in April last year, 84 percent of patients who received access to medical cannabis reduced their opioid prescriptions, compared to 45 percent who didn’t get medical cannabis access. Other studies have also found that over the last few years, there have been fewer opioid-related overdoses in states with access to medical cannabis.

Low doses of THC promote healthy brain aging.

A study released from Germany reported that consistently active CB1 receptors – the receptors through which cannabis takes effect – with low doses of THC prevents age-related cognitive decline in mice. The study found THC can impair brain function in the young, but prevent age-related cognitive decline in older animals. THC improved the number of connections brain cells made with one another in the hippocampus. The hippocampus is associated with the part of the brain responsible for learning and memory, stress and anxiety.

Cannabis controls symptoms of Parkinson’s disease.

According to a study released in November of last year, there’s evidence suggesting cannabis can relieve many of symptoms associated with the disease. A study from Tel Aviv University in Israel found smoking medicine cannabis for an average of 19 months improved many of the symptoms associated with the disease. 82 percent of participants reported that cannabis improved their overall symptoms. It reduced the number of falls, provided pain relief and improved sleep. These benefits were accompanied by little to no side effects like cough, or confusion and anxiety.

Cannabis can help improve your sex life.

Stanford University physicians analyzed sexual activity data from over 50,000 men and women. The study concluded that cannabis use increased frequency of sexual activity in both and women consistently across all demographic groups. Although, the study wasn’t able to determine whether cannabis had any effects on sexual performance like ability to attain an erection or achieve orgasm.