i actually used a drink. "magnum detox" . it tells your body, to use it, not fat, for energy. so, no fat burn, means no thc in the system, except whats in the kidneys, bladder. after a few trips to the bathroom, thats cleared. they say wait an hour. i waited for two. it is good for up to 6 hours, at which time, you start to leach thc into blood again, when drink is all used up. and i was not a light smoker. they could not beat this, so now, they just invented a better way. mouth swab, on the spot. five minutes, and fired. no escape. i quit smoking, when i found i had a great job offer. thats when i used this stuff. at my freinds work, they approach you on the job, and walk you to the bathroom. so, sythtics are no good, in this case. they watch u. aero space job. good bennies. so my freind retired from smoking, until he retires. good for him. jobs, let alone great ones, dont grow on trees. and family, responsibility, should be first on all our minds.