'Disclaimer - There are plenty of other studies out there saying the same stuff. Never trust a person on the internet. Do your own research! Talk to a doctor! Generally speaking, activated charcoal is safe but for some people, it can cause problems. https://www.sciencedirect.com/science/article/pii/S0379073811001927 This first article shows where in the body THC-COOH hangs out at. It says that the 'gall bladder fluid exhibited maximum concentrations of all analytes". In other words, THC-COOH is mostly in the bile. If you are going to attack a UA wouldn't be better to attack it where it mostly hangs out at. How can you draw THC-COOH out of the bile? Activated Charcoal. In another study, I uploaded the PDF, talks about dogs being poisoned by THC. Here are some gems from it, 'THC and its metabolites are excreted in the urine and feces. Enterohepatic recirculation is a prominent feature of marijuana metabolism. Following ingestion, 15% of THC is excreted in the urine and the remainder in feces through biliary excretion', another is, 'activated charcoal may be given to reduce absorption and THC half-life by blocking enterohepatic recirculation'. Yes, yes I know they are talking about dogs but there are enough similarities to show that this should also work on humans. The concept is the same, removing THC-COOH from the system in a speedy manner. Here is the question I have for the Forum; if we took the recommended daily dose of activated charcoal wouldn't it lower your all over THC-COOH levels making a detox faster than normal?