Cross SectionalHumann = 10,3572026United States
Unmasking Masculinity: Biological, Behavioral, and Social Determinants of Testosterone Deficiency in U.S. Men, 2011-2023.
Plain-language summary
This study looked at what drives low testosterone in U.S. men, going beyond aging to include habits and life circumstances. It analyzed over 10,000 men aged 18 and up from several cycles of NHANES (a large, recurring US government health survey), weighing testosterone against markers of metabolic health (body weight and waist size, and blood sugar control), daily habits (how much a man sits, and smoking), and social factors (marital status and access to healthcare). Low testosterone tracked with worse metabolic health and more sitting, while, unexpectedly, smoking and being unmarried were tied to higher levels. The authors argue testosterone reflects body, behavior, and life circumstances together, not biology alone.
Key findings
- Metabolic health, sleep, and relationship quality were key predictors of testosterone levels.
- Men with metabolic syndrome had higher odds of testosterone deficiency.
- Men who slept less than 6 hours a night had higher odds of testosterone deficiency.
- Men in supportive relationships had lower odds of testosterone deficiency.
How to analyze the study yourself
- Study type
- Cross-sectional studies are good for spotting patterns and links but cannot prove cause and effect.
- Population
- U.S. men aged 18 and older, excluding those on testosterone therapy.
- Funding
- Not reported
- Watch for
- This study found that excess weight, poor blood sugar control, and long hours of sitting were linked to lower testosterone, while smoking and being unmarried oddly tracked with higher levels. If low testosterone is a concern, the levers most in your control are keeping a healthy weight, managing blood sugar, and breaking up long stretches of sitting.