you know what, i can swear that its called urine luck, but very well could be wrong. either way either of the two that is the synthetic works great. as you stated, spectrum labs
ogganjagrower Reviewed by ogganjagrower on . Real Urine? Does anyone know how long real urine (clean) stays fresh. Can it be taken and then frozen until the night before the test and reheated in the morning? How long maximum in the freezer, if so? I am nervous to use synthetic. Rating: 5