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Sustanon 250 is a synthetic blend of four testosterone esters with different rates of release into the human body.
The precise breakdown is like this.
Testosterone Propionate, 30 mg
Phenylpropionate, 60 mg
Isocaproate, 60 mg
Decanoate, 100 mg
That’s a total of 250mg of Testosterone which will get released at different rates post the injection.
The faster acting esters, propionate and phenylpropionate will get released almost instantly, leading to a spike in Testosterone.
This is what makes you feel great in the days following your pin. The slower acting ester, Isocaproate gets released in the next few days, just as the effects of the faster acting esters are beginning to wane.
And then lastly, the slowest acting decanoate ester gets released.
The idea behind using a blend of Testosterone esters as opposed to a single ester is to keep the levels of testosterone stable, as well as to reduce the frequency of pins needed
The precise breakdown is like this.
Testosterone Propionate, 30 mg
Phenylpropionate, 60 mg
Isocaproate, 60 mg
Decanoate, 100 mg
That’s a total of 250mg of Testosterone which will get released at different rates post the injection.
The faster acting esters, propionate and phenylpropionate will get released almost instantly, leading to a spike in Testosterone.
This is what makes you feel great in the days following your pin. The slower acting ester, Isocaproate gets released in the next few days, just as the effects of the faster acting esters are beginning to wane.
And then lastly, the slowest acting decanoate ester gets released.
The idea behind using a blend of Testosterone esters as opposed to a single ester is to keep the levels of testosterone stable, as well as to reduce the frequency of pins needed


