Sustanon contains, 60mg/ml short-acting Testosterone Propionate, 120mg/ml of Testosterone Phenylpropionate, 120mg/ml of Testosterone Isocaproate and 200mg of Testosterone Decanoate. The first, testosterone propionate, is short-acting and gives Sustanon a quick onset of action in a steroid cycle. The other esters are medium to long-acting. Testosterone is responsible for promoting health and well-being through enhanced libido, energy, immunity, increased fat loss, gaining and maintaining lean muscle mass, preventing Osteoporosis (loss of bone density) and possible protection against heart disease Sustanon has a release time of between 1-12 days. It is typically injected twice every week, though some users opt for a higher injection frequency of three times per week. Average dosages are 250mg-1000 mg per week. WARNING: if you are going to use a high concentrated drug for the first time, we highly recommend to inject only ½ ml to check the body reaction and to prevent possible side effects, which can include post injection pain (PIP), high body temperature, lumps, etc.