They know the constituents of urine. If you try to replace it with anything that doesn't contain those, they can tell that ... it's not like they take a glass and look at it and say "Hey, that looks like piss. I bet he was stoned. Let's fail him."
Lamperus Reviewed by Lamperus on . using water as a substitude? if i use water insteada piss and its the same temp as my body temp, will i pass? its not a home test, its a doctor test... Rating: 5