If you really want to ease any worrys about the reliability of the Quick Fix, why not order some Urinecheck 7 adulteration test sticks and test the QF batch at home beforehand? The test sticks can be easily found online and they are cheaper than dirt. They are basically the same tests the labs use when they check the ph, creatinine, nitrites, and specific gravity. If your batch passes these checks at home, you have nothing to worry about.

If the batch fails the at-home validity check, exchange the batch for another one and home test that one as well.

Do a search for the Urinecheck7 sticks on www.google.com

If you use a human substitute, you should run a home validity check and a home drug check on it as well. False-positives and too-diluted test results can happen when using a human sub, particularly if the sub donor has taken certain OTC medications which can trigger the false-positive; or had consumed large amounts of fluids before donating the sample to you, triggering a "too-dilute" test result.