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Quick Summary
The foundational male hormone — energy, muscle, libido, and body composition
Also called: Test, T, Testosterone Cypionate, Testosterone Enanthate
What is Testosterone (TRT)?
Testosterone Replacement Therapy (TRT) involves supplementing the body's natural testosterone production to restore levels to a healthy physiological range. Testosterone is the primary male sex hormone responsible for muscle mass, bone density, fat distribution, red blood cell production, sex drive, and mood regulation. As men age, testosterone levels naturally decline — TRT aims to restore these levels to those of a healthy young adult. Common forms include Testosterone Cypionate and Enanthate (injected weekly), as well as gels and patches.
How It's Made
Testosterone is a naturally occurring steroid hormone. Synthetic testosterone for TRT is produced through chemical synthesis and is available as injectable esters (Cypionate, Enanthate), transdermal gels, patches, and pellets.
Potential Benefits
Who Uses This?
Common goals and use cases for Testosterone (TRT):