Those products are a waste of money, both for detoxing real piss, and fake piss, the concept they're cheating you out of is drinking a lot of water or diruetics like cranberry juice, and urinating plenty before the test. Quit smoking 3 days before the test, and you have no problem passing with the "classic" method. If it's with a saliva test, just don't smoke for a day before the test. I don't believe in any drug testing products, they're the equilvalent to weight loss supplements. To protect yourself from future drug tests is to lower your body fat and speed up your metabolism by exercising constantly to increase your chances of passing. I had a drug test a couple months ago and passed with flying colors despite being a chronic smoker for years. Just sucked it was all in vain because I got diagnosed with cancer the next day and had to turn a great job down