Either way is fine, but if you have frozen human urine that is your own and you know it's clean then I would do that. Human urine will usually stay "good" for about 1 year frozen and about 3-5 days refridgerated. If its pre-employment then subbing is fine because you don't have to worry about being watched. Follow the SUBBING sticky for the method of doing it properly. Smoke Away Bro...
thepowerrulz Reviewed by thepowerrulz on . Freeze my own urine or use synthetic? I have been out of work for 4 months now, and have only been on 3 interviews out of about 100 Resumes that I have sent out. I also stopped smoking about 3 months ago and my own urine is totally clean right now. I was wondering if there would be an advantage to freezing my own urine for substitution instead of using the synthetic urine that comes with most of the substitution kits. Basically, I want to start smoking again, if possible, while waiting for the next interview to come along. Is Rating: 5