I hope that this info comes in time for you to do what you need to do. The powdered or synthetic urine will test the same and is chemically identical to real human urine in all aspects except that it does not contain specific antibodies that are only found in real urine. The lab can actually duplicate these antibodies but it is so costly and time consuming that the average person in search of such a product would not be able to afford it.

However, the majority of drug tests are just basic panels that test only for the presence certains drugs; that's all. When you should worry: if your test is for medical reasons (insurance, physicals, etc.). This is because they are more extensive tests which check ALL aspects of your urine, not just for illegal substances but the person's complete state of health, for instance (any deficiancies, blood glucose, cholesterol, etc. and especially those antibodies).

So basically, you are probably ok using a synthetic or powdered sample if its just a drug screen. If in doubt and still want to substitute, find a "real" sample that's clean.

Also, regarding the sediment, I've been using a some friends' clean samples and passing it off as my own for some time now. They are a super health nuts, vegitarians, don't drink or use, consumes copious amounts of water and still sometimes there is a miniscule amount of sediment. Its not grainy but still visible. Just fyi.

My boyfriend was using the synthetic that came with his Pissinator, but now he's subbing a real sample just to be safe.

Really hope this is helpful. Good luck friend.;:thumbsup: