Is Nasty Mass drug test safe?
The nasty Mass drug test is not considered to be fully safe. Further research and reports are being provided for the test. Thus, it is advisable that one should not completely rely on it rather use other tests to confirm.
I'm not sure about your question, but "Nasty Mass" (Purus Labs) has been banned (and recalled) by the FDA as an unsafe anabolic steroid. Reference: http://www.fda.gov/safety/recalls/ucm188929.htm