Test 250

"Test 250" is the brand name for a blend of four testosterone esters: testosterone propionate (C3H6O2), testosterone phenylpropionate (C9H10O2), testosterone isocaproate (C6H12O2), and testosterone decanoate (C10H20O2). It features both fast-acting and slow-acting esters, and can be injected anywhere from once every week to once every four weeks.