How Long Does Marijuana Stay In Your System?

In cigarettes, the active ingredient is nicotine. In alcohol, it’s ethanol. While marijuana contains numerous Cannabinoids — compounds which act on CB1 and CB2 Cannabinoid receptors in the central nervous system — the most prominent (and most famous) by a wide margin is tetrahydrocannabinol, better known as THC. THC, or rather a metabolite called THC-COOH, is the substance marijuana tests usually screen for. But for how long can THC be detected in a urine sample? In this article, we’ll go over what medical studies say about Cannabis…