Once injected intramuscularly, the ester slowly cleaves in the bloodstream, releasing free testosterone gradually — mimicking the body's natural rhythms more closely than short-ester counterparts. It travels through the circulatory system, binding to androgen receptors across muscle, bone, and other tissue.

• Clinical TRT protocols for hypogonadism
• Endocrinology practices
• Compounding pharmacies (US-formulated)

• Oil-based, viscous solution — amber to pale yellow in appearance
• Distinguished from Testosterone Enanthate (closest cousin) by ester chain length and slightly shorter half-life
• Administered via IM injection, typically into gluteal or thigh musculature