The Claim
Median testosterone levels do not significantly differ across age groups of middle-aged (45–64), young-old (65–74), middle-old (75–84), and oldest-old (≥85) men, and the prevalence of low testosterone remains around 20% regardless of age.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Among men aged 45 and older, the average level of testosterone does not change with age, and about 20% of men in every age group have low testosterone.
See the scientific wording
Median testosterone levels do not significantly differ across age groups of middle-aged (45–64), young-old (65–74), middle-old (75–84), and oldest-old (≥85) men, and the prevalence of low testosterone remains around 20% regardless of age.
Fat tissue converts testosterone into estrogen, and as men get older, they often gain more fat. This increased fat tissue pulls more testosterone out of the blood and turns it into estrogen, which keeps the amount of testosterone in the blood from dropping even when the testes produce less. This is why many older men still have the same testosterone levels as younger men, and why about 1 in 5 men of any age have low levels — it depends more on how much fat they have than how old they are.
What the research says
1 studyStudy: RETHINKING LOW TESTOSTERONE IN OLDER MEN: ASSOCIATION WITH OBESITY RATHER THAN AGING.
The study found that men in their 40s, 60s, 70s, and even 80s+ had about the same testosterone levels, and about 1 in 5 men in each group had low testosterone — so age alone doesn’t explain the drop many people assume.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.