Beer is occasionally fined using isinglass. Happily, most beer is vegan though! Isinglass is a very pure form of gelatin obtained from fish bladders(often sturgeon). The addition of a fining product simply speeds up a process which would otherwise occur naturally.
In the case of marijuana, they are looking for the THC metabolite, THC-COOH. To figure out if you are âcleanâ for a drug test, you need to be able to determine the amount of THC metabolites in your system, as well as the testing levels for your drug screen. The half-life of THC metabolites is 7 days. Meaning every 7 days, the amount in your body will decrease by 50%. With this number in mind, most people can assume their body will be clean of THC metabolites within 3-4 weeks -- more or less depending on frequency, body weight and amount consumed.
There are lots of truths about how long it takes marijuana to leave your system that you probably didn't know. For example, THC evacuates the body quickly, but leaves behind clues that it was there at one point in time (that's how you get busted). If you've ingested a lot of water, food, and other substances, this can also alter the amount of time for marijuana to leave your system. 2  The most common date range given for people is between 3 to as long as 30 days after smoking. 3  How much someone smokes determines how long the body will keep remnants.