Cranberry juice.
Exercise.
Potassium and Iron.
Red Bull.
Common misconception: URINATING DOES NOT DECREASE THE HALF LIFE OR AMOUNT OF THC IN YOUR SYSTEM, BUT MERELY DILUTES YOUR PEE IN ORDER TO DECREASE THE CONCENTRATION.
I have smoked weed for the better half of my life and have not once tested positive in a drug test. The secret is knowing beforehand when you're going to be tested in order to lay off the grass and begin the cleansing.
The half life of THC concentration is about 10 days. There is way too much variation to even approximate how long THC will be detected in the urine of an individual. Infrequent users with a fast metabolism will have the shortest detection time. Frequent or chronic users with a slow metabolism will have the longest detection times.
If you use marijuana on rare occasions, your urine may be clean of metabolites in less than a week. There is a common and strange phenomenon that occurs with chronic users. You would expect a chronic user to have the longest detection time and the smallest chance of passing. This is not always the case. A chronic user with a high tolerance may eliminate drugs as fast as an occasional user. Chronic users have tested negative after a week long binge. Fat tissue also makes a huge difference. Skinny users not only have a faster metabolism (usually), but also lack storage for THC metabolites. The more fat a person has, the more THC metabolites will be stored in the body and thus the longer the detection time is for a user.
Usage at 2-4 times per month 11-18 days
Usage at 2-4 times per week 23-35 days
Usage at 5-6 times per week 33-48 days
Daily Usage 49-63 days
copied from an old post of mine.
you're welcome