I'm going with things vegans would avoid instead, because you could go on forever with things that a vegan *could* drink.: *Some red/pink colored soda or sugary drinks like Kool Ade might have coloring in them that isn't vegan. *Some beer, wine, & liquor is refined using isinglass, gelatin or other animal products. http://barnoivore.com is a good place to find out if your favorites are vegan or not. And of course things like Bailey's aren't vegan, but you can make your own Bailey's at home if you like it. I've seen recipes online.
Marijuana can stay in the urine for up to two months in cases of very frequent, prolonged use. Basically, the more you use marijuana, the longer it will remain in your urine. If you have just tried marijuana, for example, and that was your only use, it will probably be out of your urine within a week.
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.