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Fresh cannabis plants are around 80% water (all %'s by weight); curing generally begins after the cannabis has lost half of it's initial mass, and contains approximately 33% of it's initial water.
Long-Term / Chronic Use: 1 to 4 weeks. Note: THC, marijuana's primary active ingredient, is stored by the body in fatty lipid tissue. From there, it is slowly released into the bloodstream for up to several weeks - depending on the amount and frequency of use and the user's level of physical activity.