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THC METABOLITE S/P QN

Blood quantitative testing for THC metabolite measures THC-COOH, which can persist for days to weeks after cannabis use, especially in chronic users. While useful for documenting past use, this metabolite does not indicate current impairment — active THC in blood would be required for that assessment.

This test is used in clinical and forensic settings for documenting past cannabis exposure. Sample type is serum or plasma.

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