New Research Reveals Sugar, Not Age, at the Heart of Men’s Sexual Decline
A groundbreaking long-term study has turned conventional wisdom on its head, revealing that modest rises in blood sugar—not age or testosterone—are a primary driver of sexual decline in men. Presented at ENDO 2025, the Endocrine Society’s annual meeting, these findings highlight that even non-diabetic glucose levels can slow sperm, impair erections, and reduce libido, with important implications for men’s health across Thailand and the world (SciTechDaily).
For years, discussions about aging men’s declining sexual and reproductive health have focused on hormone levels and the inevitable march of time. But this newly published research, led by a respected German endocrinologist, argues that subtle metabolic changes—particularly slight increases in blood sugar—play a more pivotal role than previously recognized. “Although age and testosterone levels have long been considered an impetus for men’s declining sexual health, our research indicates that these changes more closely correlate with modest increases in blood sugar and other metabolic changes,” said a University Hospital in Muenster professor involved in the study. This suggests that lifestyle management and blood sugar monitoring may hold the key to preserving sexual health as men age.