Decline in Testosterone Levels
2007
Decline in Testosterone Levels
publication
Evidence: high
Author Information
Author(s): Richard Anthes
Primary Institution: New England Research Institutes
Hypothesis
Testosterone levels have declined in the population over the past 20 years.
Conclusion
There has been a significant populationwide decline in testosterone levels unrelated to aging or known health effects.
Supporting Evidence
- Testosterone levels have declined by about 1.2% per year.
- Overall decline in testosterone levels is about 17% from 1987 to 2004.
- Lower testosterone is linked to age-related diseases, depression, and infertility.
Takeaway
Testosterone levels in men have been going down for the last 20 years, which could lead to more health problems.
Methodology
The study analyzed testosterone levels over a long duration in a large sample size.
Participant Demographics
The study focused on men from the Massachusetts Male Aging Study.
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