6 Answers

You can clean your system when you quit smoking marijuana!

first stop smoking the stuff then drink loads of water and start drinking herbal tea if you are having a test they can tell wether you have been using ( from the hair ) from the last 6 months good luck and dont for get to quit

Stop using marijuana which harms your immune system.  Drink carrot juice that contains beta-carotene to boost your immunity.

stop smoking and wait. In 7 years every cell in your body will have been replaced, then get a hair cut. As a result you won’t have a trace of pot in your body.  

Stop using the stuff! You will be better off in your pocket too.

Stop smoking. If you're a guy, it could cause impotence.