Description

Sustanon 250 represents a testosterone injection blend comprising propionate, phenylpropionate, isocaproate, and decanoate esters. This unique combination of esters enhances the pharmacokinetic profile of "4 Test Inj," as it combines the rapid onset characteristic of propionates with the extended effects of isocaproate and decanoate esters. As a result, it maintains a consistent testosterone level in the bloodstream for an extended duration. The attachment of distinct esters to the 17-beta-hydroxy group extends the activity of testosterone, owing to the lower polarity of testosterone esters compared to free testosterone. Administered via intramuscular oil injection, testosterone esters are gradually absorbed from the lipid phase. Consequently, "4 Test Inj" can be administered at intervals ranging from two to four weeks, ensuring sustained effectiveness.