A recent study has revealed that metabolic health indicators, particularly even slight elevations in blood sugar, play a central role in altering the reproductive and sexual functions of aging men. The findings were unveiled during the 2025 annual meeting of the Endocrine Society (ENDO), held from July 12 to 15 at the Moscone Convention Center in San Francisco, California, USA.

"Although age and testoterone 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 Michael Zitzmann, MD, PhD, professor and doctor of medicine at University Hospital in Muenster, Germany.

"This means that men can take steps to prepare or revive their reproductive health with lifestyle choices and appropriate medical interventions."