i must say that after paying high prices for human grade, i must say that vet grade is how i will go for the rest of my time juicing. its cheap, i can make a better cycle with a wider availablility of products. And they actually have been less painful for me. But, as to each and everyperson, it pays to know your source and have trust in them. better to know what is going iunto your body.
What manufacturer? This mean's alot. Several mfr's are packaging the product as vet grade but in many cases its entirley intended for human consumption.
I grow the same on human or vet grade or home brew. Never noticed a difference between say vet enanthate and human enan or sust for that matter. Can't tell you about exotics like mast, tren cyclohex, etc... never had legit human grade on these.