Low Testosterone May Be Driven by Something Other Than Aging
It's not inevitable.
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Researchers are challenging the widespread assumption that testosterone decline is an inevitable consequence of aging in men. While testosterone levels typically begin to drop gradually around age 35, a new analysis suggests that where the body stores fat may play a more significant role than chronological age itself.
Scientists from the US Army Research Institute of Environmental Medicine examined health data from approximately 5,000 American men aged 20 to 59. Their findings, published in the Journal of the Endocrine Society, indicate that visceral fat—the deep abdominal fat surrounding vital organs—demonstrates a stronger connection to reduced testosterone than aging does. This type of fat tissue contains numerous testosterone receptors, making it particularly responsive to the hormone’s presence.
Previous studies support these conclusions. Research from 2007 showed that gaining just 4 to 5 BMI points produced testosterone reductions comparable to roughly a decade of aging. The researchers note that traditional obesity measures like BMI may not capture the complete picture, since men with similar BMI values can have vastly different testosterone levels depending on visceral fat distribution.
The study authors suggest that interventions targeting visceral fat reduction—whether through medication or lifestyle changes—may address low testosterone more effectively than hormone replacement therapy alone. This discovery emphasizes the importance of understanding fat distribution patterns before pursuing testosterone treatments.
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Originally reported by Sciencealert →
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