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Testosterone
What Does Testosterone Actually Do in the Male Body?
A clear look at one of the body’s most important hormones.
5 min readPublished September 12, 2026Medically reviewed by: Licensed Medical Provider
Testosterone is often associated with strength, but its role in the body is much broader.
Key roles of testosterone
- Muscle and bone maintenance
- Red blood cell production
- Sexual function and libido
- Mood, focus and motivation
- Fat distribution and metabolism
How levels change over time
Levels tend to decline gradually with age, and sleep, weight, stress and certain medications can also play a role. Learn more on Men’s Hormone Health.
Medical Disclaimer
This content is provided for educational purposes only and is not intended to diagnose, treat, cure, or prevent any medical condition. Individual treatment decisions should be made with a licensed medical provider based on your medical history, symptoms, laboratory results, risk factors, and other relevant information.
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