I would use the synthetic urine because it is always 100% effective if you get the temperature right. No they cannot tell if its synthetic. A donor urine sample would also be affective if you know this person is clean and you can obtain the sample shortly before you have to take the UA. It starts to go bad after 8 hours and I wouldn't push it past 6 just to be safe. They cannot tell if its male or female urine so your good there. You could pick up a thermometer at Walmart or Wallgreen's, I dont think GNC would have them.
Deige Reviewed by Deige on . synthetic vs. real So I have a whizzinator which I havn't used for a long time. I've been clean for about 8 months but I slipped up and it is very possible I will have to bring it out again on my upcoming UA. I have synthetic urine which I was planning in using however I also have the option to use real urine but it would be from my female friend who I know is clean My question is this: Which is the better choice? synthetic urine, or real urine from the opposite gender? is it possible they will know it Rating: 5