Study Reveals Blood Sugar, Not Age or Testosterone, Key to Men's Sexual Health
July 13, 2025
Testosterone influences libido but does not have a direct effect on erectile performance.
Findings suggest that maintaining good metabolic health is key to sustaining reproductive health as men age.
While testosterone levels do not directly impact erectile function, they are linked to libido assessments among men.
A recent study highlights that metabolic health, especially blood sugar levels, plays a more crucial role than age or testosterone in the decline of men's sexual health.
The research underscores that men can preserve or even improve their sexual health through lifestyle changes and medical interventions, emphasizing the importance of metabolic health.
Men with slightly elevated blood sugar levels below the diabetic threshold (6.5% HbA1c) showed declines in sperm motility and erectile function, despite hormone levels and semen parameters remaining mostly normal.
Even mild increases in blood sugar, below diabetic levels, are associated with impaired sperm movement and erectile performance.
A long-term study conducted from 2014 to 2020 followed 117 healthy men aged 18 to 85, examining changes in semen quality, hormonal profiles, and erectile function.
The study involved 200 initial participants, with 117 remaining after six years, none of whom had diabetes, heart disease, or cancer.
Researchers tracked these men over six years, focusing on hormones, semen quality, erectile function, and blood sugar levels.
This research, part of the FAME 2.0 project, aims to help healthcare providers develop effective strategies for maintaining men's sexual health.
The findings are expected to guide healthcare professionals in creating personalized plans to preserve male sexual health.
Summary based on 3 sources
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Sources

ScienceDaily • Jul 13, 2025
Not just diabetes: How slightly high blood sugar wrecks men’s sexual health
Medical Xpress • Jul 12, 2025
High blood sugar may have a negative impact on men's sexual health
Neuroscience News • Jul 13, 2025
Blood Sugar, Not Age, Drives Sexual Health Decline in Men