i have 15 days to get thc out of my system what is the best method?!

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Perhaps you could try the Niacin THC detox.

Web search for "niacin thc detox"

drink lots of water, cranberry may help i guess...thc gets stored in body fat too, so working out may help as well

if you smoke a lot, you may just be in trouble cause it generally stays in your system 3 weeks. drink like 2 gallons of water a day, and your urine may just be clear if you do this, so take a "super B complex and c" vitamin to give it color when you take the test.

If you're not a frequent user you should have no problem. It's only detectable for 2-3 days in blood and 3 to 7 in urine.
In case you use frequently, then, you sir are in trouble. That is because THC bonds to fat cells and is slowly released in you metabolism long after you stop using. It can be detected in urine 21 days after you last used.

Drink a lot of cranberry juice and two shots of white vinegar..

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