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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.
Factors Affecting the Elimination of Marijuana. Estimating how long marijuana stays in the body is a challenging task because of the many factors that influence the drug's elimination. Some of these include: Amount and frequency of use: Frequent or heavy marijuana use typically results in longer elimination times.