It doesn't. You might as well drink cranberry juice or some other dieuretic. When taking a test, you have THREE options.

1. Subsitution < Hand down best method.
2. Dillution < Most common, but if you're vitimans are low, they can detect it.
3. Additives < Clearchoice seems to work ok with tests, but not screens (I maye have that backwards), and they can be detected by some labs.

How you go about doing these options will vary, but you're best bet is substitution. Best chance to pass unless they watch you piss...
benagain Reviewed by benagain on . does any body know how quick certo works i got to see my PO on jun 5 and i go in about 10Am and i cant let my wife find out i am using these she think i quit and if i fell a drug test i will go to jail for 5 years and these is the cheapes thing i can find and have any body use these on PO these year let me no ASAP :smokin: :thumbsup: Rating: 5