I've used vet grade and human grade and had excellent results from both. After my next cycle I plan on using pretty much nothing but QV gear. They are always up to par on their lab tests and are less than half the cost of their human grade counterparts. I've never used UG lab stuff but will be running some syrus d-bol and eq along with karachi sust my next cycle. If you've got the money then go human grade, if not don't sweat it...you'll get the same results off of vet grade. Just make sure you stick with products made by Quality Vet, Denkall, Jurox and Animal Power.