Your best bet is definitely with synthetics. You want the "Canadian" version of Quick Fix. Version 5.7-1

Basically all "Canadian" means is that it contains uric acid. Labs began testing urine for urea or uric acid in an attempt to detect when synthetics were being used. Only a few states at this point are actually testing for uric acid, but regardless you want the version containing it.

Moral of the story on this is, you won't fail anywhere for HAVING uric acid in it, but you can certainly fail in places for NOT HAVING it. It's a no brainer.

Subbing takes research and practice, but isn't difficult.