Three compounds share the ampoule here. Mag-Jack 250 combines trenbolone acetate, drostanolone propionate and testosterone propionate to a total of 250 mg per millilitre, packed by Magnum Pharmaceuticals as five 1 ml ampoules.
The logic behind a blend like this is matched kinetics: all three esters are short, so the components release and clear on broadly the same schedule rather than one lingering after the others are gone. Chemically the actives are quite distinct - a 19-nor compound, a DHT derivative and testosterone itself - which is what sets a mix apart from a single-hormone ampoule.
