I have to say that this isn't true, it really all depends on your physiological make-up. Some things work for some people not for others. I have been on state parole for seven years and have only failed a few times due to dehydration. I use a product called Herbal Clean Quick Tabs (the quick caps come back diluted, but these don't). But, this hasn't worked for everyone that I recommend it to, just like golden seal and others do not work for me.
It would seem that I got lucky in finding something that will help me pass. I haven't stopped smoking for more that three days in over five years, but I don't recommend that anyone under the long arm of the law try all the stuff that I did. I have tried so many other methods when I couldn't get what I usually use, and all of them failed. Luckily I have a PO from heaven, who I'm relatively sure is a head himself.
And, just to clear this up, I'm talking about a lab test where you have to put the sticker over the lid and initial it. They check for cocaine, thc/cannibinol, benzos (xanax, valium, etc.), opiates (they can tell you what opiate you took), methamphetamine, mdma/ecstacy, barbituates, and phencycladine(angel dust/ sherm/pcp). They also test for some other substances that I'm not familiar with. I assume they're for covering up hot urines, because they always ask if I've been using any drugs OR dietary supplements. They also tell us that there are no substances anymore that will give you a false positive, I would have to assume that this is because of the gas test that you are talking about.
