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Omnadren is an oil-based injectable containing a blend of four different testosterone esters: Testosterone propionate, phenylpropionate, isocaproate and caproate. This preparation is quite similar to Sustanon, and is different only in that testosterone caproate is instead of the testosterone decanoate used in Sustanon. For this reason, Omnadren has a shorter half life, and will give a faster initial increase in blood level. The hexanoate ester is quite similar to the well known enanthate ester, but is shorter by one carbon.
Testosterone esters in Omnadren:
* Propionate: Propionate esters will slow the release of a steroid for several days. To keep blood levels from fluctuating greatly, propionate compounds are usually injected two to three times weekly.
* Phenylpropionate: Phenylpropionate will extend the release of active steroid a few days longer than propionate. To keep blood levels even, injections are given at least twice weekly.
* Isocarpoate: Isocaproate begins to near enanthate in terms of release. The duration is still shorter, with a notable hormone level being sustained for approximately one week.
* Caproate: This ester is identical to isocarpoate in terms of atom count and weight, but is laid out slightly different. Release duration would be very similar to isocaproate (levels sustained for approximately one weak), perhaps coming slightly closer to enanthate due to its straight chain. Caproate is the slowest releasing ester used in Omnadren.
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