Recently, I have gotten a half a done phone calls and EM's about alleged positive drug tests (usually amphetamine/methamphetamine) related to sports nutrition products, typically fat loss stuff and stimulant powder products.
I'm not buying it. Sorry.
1st - we have tested our stim type products for positive drug tests (e.g., will geranamine or hordenine or OF cause you to false positive for amphies). The answer is (at least if the test is done by LabCorp's method on urine) "absolutely not!" The "screen and confirm" option is what we picked and we have someone "hyperdose" the product for two days before going to LabCorp to pee.
Not coming back reactive for anything. Sorry.
2nd - A three letter company with a very popular stim powder and cap has recently been accused of lacing samples and earlier lot numbers with amphetamines and this is supposedly causing positive drug tests. I don't much like the guy who is CEO of this company but I do sincerely admire his business acumen highly and his ability to surround himself with the correct people to grow his business. He went from essentially nothing to $100M in a 18 months (yes, they really are that big now guys from basically two products - I suspect more from "rec users" looking for a cheap buzz than athletes's but hey, they are filling a niche and selling the beejeezus out of it so kudos to them!). Deserusan and I test a lot of competitors products each month. We have tested domestic and internationally sourced bottles of the Three Letter Company as well as sample packets given out at shows. Yeah, its got geranamine and caffeine in it (but that's right on the label) - WOW! I am shocked! But what was not in there was anything remotely looking like an amphetamine in MW or the way it "blows up" in a GC/MS instrument. The constituents were compared to what was in the Wiley Database and there is nothing unknown or illegal in there. Same for several other popular "crack and stim" powders out there.
3) I am doubting these "alleged" drug tests people are claiming. What I suspect is happening is someone on probation or parole or otherwise subject to UA's is hearing that these prods will cause a false positive and are trying to blame them for their real, illict meth use.
4) The only caveat I would add is "methylsynephrine" - we have not tested products containing this on the label to see if it will cause a positive drug test. But most of these products say right on the bottle, "don't use if you are subject to drug testing" - if you can't or won't read the label, you should not use the products guys.