Colorado Marijuana Study Finds Legal Weed Contains Potent THC Levels

This is not your father's weed.

Colorado marijuana is nearly twice as potent as illegal pot of past decades, and some modern cannabis packs triple the punch of vintage ganja, lab tests reveal for the first time.

In old-school dope, levels of THC — the psychoactive chemical that makes people high — were typically well below 10 percent. But in Colorado's legal bud, the average THC level is 18.7 percent, and some retail pot contains 30 percent THC or more, according to research released Monday.

"That was higher than expected," said Andy LaFrate, president of Charas Scientific. His Denver lab is licensed by the state and paid by marijuana businesses to measure the THC strength in their products before they go to market. "It's common to see samples in the high 20s."

What's really in — and not in — Colorado's retail weed surprised LaFrate. After analyzing more than...

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URL: 
http://www.nbcnews.com/storyline/legal-pot/legal-weed-surprisingly-strong-dirty-tests-find-n327811