Testosterone — The Hormone Behind Energy, Drive and Longevity
Decline starts at 30 and accelerates silently. Here is how to catch it early.
Track This Biomarker Free → ← All BiomarkersWhat Is Testosterone?
Testosterone governs muscle protein synthesis, bone density, red blood cell production, cognitive function, and emotional regulation. Total testosterone above 700 ng/dL is associated with optimal male health markers. Below 400 ng/dL: fatigue, reduced libido, muscle loss, brain fog, and depression — often misdiagnosed as aging.
Why It Changes
- Age — natural decline of 1–2% per year after 30
- Elevated cortisol — cortisol and testosterone are inversely linked
- Poor sleep — 80% of testosterone is produced during sleep
- Excess body fat — adipose tissue converts testosterone to estrogen via aromatase
- Alcohol and processed food consumption
- Environmental xenoestrogens — plastics, pesticides, personal care products
How Hunuu Health Uses This Signal
Hunuu tracks testosterone proxies continuously via HRV, sleep architecture, and activity data, establishing a hormonal baseline that flags early decline trends. Sweat biomarker integration adds direct cortisol-testosterone ratio monitoring.
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