Study: Chronic Cannabis Consumers have persistent traces of THC in blood

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Study: Chronic Cannabis Consumers have persistent traces of THC in blood

According to clinical trial data released in the journal of the American Association of Clinical Chemistry chronic cannabis users may test positive for trace, residual levels of THC in blood

Study: Chronic Cannabis Consumers have persistent traces of THC in blood

BALTIMORE, MD - According to clinical trial data released in the journal of the American Association of Clinical Chemistry chronic cannabis users may test positive for trace, residual levels of THC in blood for several weeks after ceasing the use of marijuana.

30 long-term daily marijuana users participated in the trial, consuming ten joints per day (self-reportedly).

12 of the individuals (59%) tested positive for THC levels higher than 1ng/ml, but not a single one tested at levels greater than 5ng/ml.

Within 7 days after consumption all of the trial subjects THC/blood levels tested below 1ng/ml.

According to the investigation, the THC/blood levels "did not always lower in a consistent manner" and that one person in the study continued to test positive for trace levels of THC for a period of 33 days.

"These data are critical for understanding cannabinoid pharmacokinetics in this population and for interpreting blood cannabinoid tests", the authors concluded and that "to our knowledge, these are the first blood cannabinoid concentrations in chronic daily cannabis smokers during extended (up to 33 days) and continuously monitored abstinence.