A social media post claims that average testosterone has fallen close to 50% in the last 2 decades. We fact-checked and found this claim to be Half-true.
A post on Twitter reads “Here’s a cheery Friday fact. An average 22 year-old male today has roughly the same testosterone levels as a 67 year old had in the year 2000. Average testosterone has fallen close to 50% in the last 2 decades, and nobody is talking about it.”
What is testosterone?
Testosterone is a sex hormone that is made in the testicles. It is important for normal sexual development and functions in males. It is responsible for the growth of body and facial hair, a deeper voice, and muscle strength in males. The American Urology Association (AUA) identifies low blood testosterone (Low-T) as less than 300 nanograms per deciliter (ng/dL).
Is testosterone level dropping in males?
Yes. A 2007 study in the Journal of Clinical Endocrinology and Metabolism, revealed that “Recent years have seen a substantial, and yet unrecognized, age-independent population-level decrease in T (Testosterone level) in American men, potentially attributable to birth cohort differences or to health or environmental effects not captured in the observed data.”
According to a report from JAMA, testosterone therapy among American men is increasing with time.
Have testosterone levels dropped by 50% in the recent decades?
Not exactly. As per a study done by European Urology, “The mean testosterone levels declined over time: TT levels were lower in the later (2011–2016) than in the earlier (1999–2000) cycles (all p < 0.001). Testosterone deficiency has a prevalence of 20% among adolescent and young adult (AYA) males.”
Even though the levels have dropped, but according to the current data available, the number is not exact 50%. So, until there is substantial evidence that proves that the levels have decreased by exact 50%, the claim remains half-true.
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