Way more than doctors anticipated.

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In Colorado, the number of young children exposed to marijuana, mostly through edibles, is up 150 % since 2014, a study found. Reason and The Washington Post argue that the risk remains very small.

A study in rats found that exposure to pot smoke can damage blood vessels.

One in 13 Americans older than 12 have used marijuana in the past month, a new government studyfound. That figure has held steady for about 25-years. It’s least popular between Texas and Alabama. (Here’s a map.) States where it’s less common are more likely to be concerned about marijuana.

A Globe and Mail investigation found that mold and other contaminants are widespread in the Toronto MED supply. Colorado released numerous seized batches after they tested negative for pesticides.

Following a scare, Colorado determined that THC was not in the drinking water in the tiny town of Hugo, Colo.

A bill in Congress that would expand MED research does not include products containing THC or the parents of children with autism in its “Safe Harbor” clause.

In Arizona, a long-anticipated study to test MED on veterans with PTSD will begin seeking patients soon.

Michael J. Stevens writes on the promise of cannabis tissue culture.

The Guardian can’t find any evidence for the myth that babies are awash with endocannabinoids, cannabinoids produced by the human body at birth.

Carfentanil, a powerful opioid used to sedate elephants is causing overdoses in heroin users. Time asks if MED can mitigate the opiate epidemic. (See The Hill for more.)

A Colorado judge blocked the suspensions of four doctors, the first in the state to be punished foroverprescribing the number of plants MED patients can grow or trust to caregivers. Heavy prescribing doctors could see business decline with legalization, the Guardian reports.

Dr. Michael Soler is the first physician in Puerto Rico allowed to recommend MED.