Testosterone Undecanoate

Testosterone undecanoate is the longest-acting injectable testosterone there is. One 1000mg shot is designed to cover roughly three months, which removes the daily or weekly ritual entirely and makes it the least intrusive option in the category.

The oil and the volume matter

Undecanoate is usually carried in castor oil with benzyl benzoate, and that carrier is the reason it needs proper technique. The volume is large - 4ml is typical for a 1000mg dose - so injecting it slowly into the glute takes patience. Inject too fast and it is genuinely painful. Done properly, most people find the discomfort manageable and the convenience unmatched.

Checking the product

• 1000mg per 4ml is the standard concentration - confirm it on the label.
• The oil should be clear and viscous, not separated.
• Cold storage is essential for undecanoate; if it has been shipped warm, treat it as suspect.
• Check batch, expiry and seal integrity.