Qcarbo has worked for me 1 out of 2 times. The time it worked I was in Iraq back from my 2 week break. I obviously hadnt smoked before break and blazed alot while home. I got tested about 10 days after returning to Iraq. I knew it was coming so I drank a Qcarbo I had from b4 and drank about a gallon of water over 3 hours and passed. I used qcarbo the same way for a test 10 days ago, this time I had been usiing heavily and smoked the night before. FAILED.
I got another chance and cant eff it up. I am going with the QF. My families livlihood is on the line.