How Long Does THC Stay in Your Blood After Smoking?

Duration of THC in the Blood

THC, the primary psychoactive compound in cannabis, typically remains detectable in the blood for 1 to 3 days after smoking. This duration can vary based on individual factors such as metabolism, body fat, and frequency of use.

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Factors Influencing Detection

  • Metabolism: Individuals with faster metabolisms may eliminate THC from their blood more quickly.
  • Body Fat: THC is stored in fat cells, so those with more body fat may retain THC longer.
  • Frequency of Use: Regular users may have THC detectable in their blood for a longer period.

Testing Methods

Blood tests are used to detect THC, with cutoff levels varying. A common cutoff is 50 ng/mL, but this can vary by jurisdiction.

cannabis blood test detection window