i dont know since underground labs from what i know that were in usa sold half the time fake and way underdosed hormones ,,sometimeswith products that were not even what they said they were but mainly way underdosed to a point of having a vial saying 250mg of testosterone and in reality you had in 25mg of testosteronne in the all vial,,so in this case you will need about 10 vials of the underground garbage to compare to one american pharma vial,,you just never know with underground,,many of the people behind underground are shady people with criminal back round ,,they would deal narcotics same as they deal hormones they dont give 2 shits about you and only want and aim at earning the most money in the shortest time possible,,all of them fall usually wether it is by goverment or by local crimes they commit ,,99% of them have criminal past and record and they are marked men due to other crimes