Okay-I'll buy that. I know nothing about mass producing supplements so this sounds reasonable. I have heard of athletes (1 or 2 cases) testing positive for nandrolone or norandros and they were able to successfully prove that they ate tainted energy bars. I find hard to believe that a supp company would use the same mixing vats for andros and energy bars. Anyway I'd guess the the trace contamination is minute.
Thanks for responding-your answer soothes some concerns I had about cross-contamination. Plus I had been wondering about the detectability of 1-AD or 4-Ad in urine (length of time its detectable in urine/blood) and your answers are helpful. Most people couldn't say how long it would take a prohormone to clear your system. One guy said 5-6 weeks which didn't sound unreasonable, but seemed long. He siad this in regards to 4-AD. Anyway thanks.
FHG