Re:sus 300 advise.
It could be anything alot of UGL`s make a Test mix of 100 mg of Test Prop, 100 mg of Test Enth and 100 mg of Test Cyp and call it sust.
or it could be a mix like Rep said.
Personally theres no way I would inject anything that hasnt got a label on it stating what is in it. it may be 300 mg of any Test you like how the hell do you know. If there is Test in it no matter how small you will make some gains.
My body is like a Walking Chemical Factory.