Weed, or marijuana, is a substance that is widely used for recreational and medicinal purposes. However, its use can also be a cause of concern, especially in situations where drug tests are required, such as in the workplace or in legal proceedings. One of the questions that people often ask is how long weed stays in their blood stream.
The answer to this question is not straightforward, as it depends on a number of factors, including the frequency and amount of use, the method of consumption, and the individual's metabolism. Generally speaking, THC, the active ingredient in weed, can be detected in the blood stream for up to a few days to several weeks after use.
In occasional users, THC can be detected in the blood stream for up to 2-3 days after use. In frequent users, however, THC can be detected for up to a month or more after use. This is because THC is stored in fat cells in the body, and is released slowly over time.
The method of consumption can also affect how long weed stays in the blood stream. Smoking or vaping weed results in a faster onset of effects, but also a shorter duration of action. THC can be detected in the blood stream for up to 24 hours after smoking or vaping.
On the other hand, ingesting weed in the form of edibles or tinctures results in a slower onset of effects, but also a longer duration of action. THC can be detected in the blood stream for up to 72 hours after ingestion.
Furthermore, individual factors such as age, weight, and metabolism can also affect how long weed stays in the blood stream. THC is metabolized by the liver and eliminated from the body through urine and feces. People with a faster metabolism may eliminate THC from their system more quickly than people with a slower metabolism.
It is important to note that drug tests can detect not only THC, but also its metabolites, which can stay in the blood stream for longer periods of time. This means that even if the effects of weed have worn off, a drug test can still detect its use.
In conclusion, how long weed stays in the blood stream depends on a variety of factors, including frequency and amount of use, method of consumption, and individual metabolism. While occasional users may test negative for THC within a few days, frequent users may test positive for up to a month or more. As such, it is important to be aware of the potential risks associated with using weed, especially in situations where drug tests are required.
References:
Huestis, M. A. (2007). Human cannabinoid pharmacokinetics. Chemistry & biodiversity, 4(8), 1770-1804.
Karschner, E. L., Schwilke, E. W., Lowe, R. H., Darwin, W. D., Pope, H. G., Herning, R., & Huestis, M. A. (2009). Do Δ9-tetrahydrocannabinol concentrations indicate recent use in chronic cannabis users?. Addiction, 104(12), 2041-2048.
Milman, G., Schwope, D. M., Schwilke, E. W., Darwin, W. D., Kelly, D. L., Goodwin, R. S., ... & Huestis, M. A. (2013). Oral fluid and plasma cannabinoid ratios after around-the-clock oral THC administration. Journal of analytical toxicology, 37(6), 338-344.
Ramaekers, J. G., Kauert, G., Van Ruitenbeek, P., Theunissen, E. L., Schneider, E., Moeller, M. R., & Ruitenbeek, P. V. (2006). High-potency marijuana impairs executive function and inhibitory motor control. Neuropsychopharmacology, 31(10), 2296-2303.
Vandrey, R., Herrmann, E. S., Mitchell, J. M., Bigelow, G. E., & Flegel, R. (2017). Dose-related effects of smoked cannabis on human behavior, cognition, and subjective experience. Journal of psychopharmacology, 31(9), 1036-1047.
