Quote Originally Posted by 5stringRUMBLE
I rechecked the abstract from the Oxford website. The word "diluted" is not mentioned. I am too cheap to buy the full paper, as I would probably not understand most of it anyway. I do not know why I added the word, "diluted". See what abstaining from weed does to me?



Zinc Reduces the Detection of Cocaine, Methamphetamine, and THC by ELISA Urine Testing

I would guess that it will only be a matter of time for zinc to be added to list of detectable adulterants.
If zinc was ingested rather than added to a urine sample, it is erroneous to label zinc as an "adulterant". A more accurate label in this case would be an "interferant".

Just setting the record straight.