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Study: Marijuana Potency Has Tripled Since the 1980s

These potency levels are high.

Marijuana is three times more potent than it was in the ’80s, experts say.

A new study carried out by Andy LaFrate, president of Charas Scientific, a research lab in Colorado, tested the potency in more than 600 marijuana samples from recreational pot merchants and concluded that it’s more potent than illegal pot from past decades.

“We’ve seen a big increase in marijuana potency compared to where it was 20 or 30 years ago,” LaFrate said in a video released by the American Chemical Society. “I would say the average potency of marijuana has probably increased by a factor of at least three.”

LaFrate said that the tetrahydrocannabinol or THC levels — the psychoactive chemical that makes people high — 30 years ago were all under 10%, but now test samples mark THC levels anywhere between 20% and 30%. [Read more at the New York Daily News]

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