Quick saliva test can reveal cannabis use over the past 12 hours

Marijuana joint in a hand

A five-minute test can show if someone has recently smoked marijuana


A new saliva-based test can reveal whether someone has consumed marijuana in the past 12 hours, and even provide the drug’s concentration levels, with results in less than five minutes.

The fast-acting cannabis test is less invasive and far faster than current gas chromatography mass spectrometry (GC-MS) tests that use blood or urine samples and can take several days to read. And unlike these other detection methods, the results focus only on recent consumption, meaning they can show whether …

Read more at New Scientist

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