When Cool Teens started vaping weed at increasingly higher rates, they inadvertently exposed a scientific grey area: Is there actually a difference between smoking weed and vaping it? A study published Friday in JAMA Network Open has an answer, though it may not be that comforting to vape enthusiasts.

This small study, overseen by Johns Hopkins School of Medicine’s Ryan Vandrey, Ph.D., an associate professor of psychiatry and behavioral sciences, is really all about the delivery of THC — the psychoactive compound in weed. The various ways THC gets into the body produces effects on radically different timescales (as anyone who’s experienced edibles can attest).

Read More… Scientists Discover a Key Difference Between Smoking Weed and Vaping It

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