Promise of marijuana leads scientists on search for evidence

by Carla K. Johnson

In this Friday, March 22, 2019 file photo, an employee at a medical marijuana dispensary in Egg Harbor Township, N.J., sorts buds into prescription bottles. At the end of 2018, about 1.4 million Americans are actively using marijuana to treat to treat anxiety, sleep apnea, cancer and other conditions, according to an Associated Press analysis of states that track medical marijuana patients. (AP Photo/Julio Cortez, File)

Marijuana has been shown to help ease pain and a few other health problems, yet two-thirds of U.S. states have decided pot should be legal to treat many other conditions with little scientific backing.

At least 1.4 million Americans are using marijuana for their health , according to an Associated Press analysis of states that track medical marijuana patients.

The…

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