I started reading this and it sounded ligit, too lazy to find the answer your looking for, good luck homie.

All of the products they sell at GNC, Vitamin Shop, Health food stores are absolute wastes of your money. If you are a small time user 1-2 times per month and have low body fat you should be clean within 2 weeks. If you are a chronic user it could take up to 6 weeks to detox. The metabolites of THC are lipid soluble, they are stored in fat cells. The individuals metabolism and exercise habits can make a difference in excretion of metabolites. A skinny person who exercises a lot and uses infrequently can test negative 3 days after using. A heavy person who doesnt exercise is in a bit of a bind. All those herbal extracts mentioned are now tested for first, before testing for illegal drugs, and may be considered by some labs to be a positive immediately. Some will forward it on for gas chromography analysis and a mass spectrography assay which will then find the metabolites you have tried to mask.
Now I can tell you as a user and Pharmacist who conducted an experiments in a lab what does and doesnt work. The herbal masking agents do not work and will cause you more trouble then they are worth and will waste your money as well. You must detox using water. Large amounts of water must be ingested starting at least 36 hours before the test, up to 1 liter per 14.25kg of body weight per 24 hours. You must also supplement with creatine monohydrate, a bodybuilding supplement found in healthfood stores, at a rate of 1 teaspoon per 14.25kg of bodyweight. Just mix it with your liters of water. A prescription diuretic called Furosemide should also be added to ths water/creatine therapy at a dosage of 1 mg per kg of body weight per day administered in 2 doses. AM and Afternoon. When a specimen is examined they look for the diluteness of the sample by checking creatinine ( a byproduct of muscle metabolism) levels. Supplementing with creatine causes a sample taken after heavy water consumption to look as if normal creatinine levels are present. The diuretic which is very strong helps to flush the toxic and excess fluids from your body. Its like getting an oil change of sorts. THC metabolites may be present in your fat cells but you are essentially a faucet when you donate your specimen. The day of your test you should avoid excess physical activity and drink the water and creatine mixture and use the furosemide as stated above. You should also take Super B complex vitamins as well as vitamin C several times on the day of your test. This will provide color to the urine so that it does not appear as dilute. When you donate, urinate for a short time then hit the cup about 1/2 way through urination. This is so anything in the urethra is expelled prior to donation. Cranberry exctract may be added to the detox therapy above if you are concerned about kidney function while using the creatine monohydrate. I have been a regular smoker, 10-15 times per month, in average shpe, and used the above program to pass a screening exactly 7 days of no use. My colleagues have also used this method to test negative in screening. You may want to practice this several times, without the Furosemide. Follow the water and creatine method for 36-48 hours then get a clear glass and urinate in it as directed. Hold it up to the light and you should see the excess creatine monohydrate that has not been absorbed by the body floating in the urine like a suspension. Take your vitamins and repeat this process again. If you get a call from the testing agency inquiring about the creatinie in yoru urine simply tell then that you lift weights and jog and do use performance supplements. Good luck, this process has worked for many health care professionals who like to puff. That is why my colleagues and I set out to decifer a way to pee clean. Good luck.