Is 7-OH Really “13 times stronger than morphine”?
Multiple news media and even medical professionals have repeated the claim that 7-hydroxymitragynine (7-OH) is “13 times stronger than morphine” as though it is a fact established through rigorous science. Where does this claim come from and how accurate is it? The claim comes from studies from 2002 (Takayama, et al) and 2004 (Matsumoto, et …
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