Tweetold hard qestion there bro.. know a guy somewhere in the northeast that was big into BB'n in the 80's.. has a boat load of mas... i've looked in down and had some tested and talked to the guys on the board that have test many of the other one's claiming to be masteron... most came back somewhere around 36mg/ml tren... on an average.. some of th e time the cost with the "masteron" comes down to teh simple point of.... TREN IS YOUR FRIEND"