Traces of cannabis found in pre-modern human bones for the first time

A 17th century hospital crypt in Milan, Italy has yielded the first archaeological evidence of cannabis' psychoactive components in human bones.

The first evidence of cannabis discovered in archaeological skeletal remains comes from bones of people buried under a hospital in Milan, Italy in the 17th century.

“Molecules of medicinal plants can be detected by toxicological analysis even centuries after the death of an individual,” says Gaia Giordano at the University of Milan in Italy.

She and her colleagues discovered molecules of tetrahydrocannabinol (THC) and cannabidiol (CBD) – the psychoactive components of cannabis – within the thigh bones of a young male and middle-aged female who had been buried between 1638 and 1697. Such molecules can be trapped and preserved after being absorbed into the bloodstream and traveling through blood vessels into bone tissue.

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