Popular weight-loss drugs linked to unexpected male fertility benefit
GLP-1 drugs like semaglutide and liraglutide do not appear to suppress male hormones and may boost fertility in obese men, new research suggests.
Taking a GLP-1 medication for weight loss may improve male fertility, according to experts.Research presented this week at ENDO 2026, the Endocrine Society’s annual meeting in Chicago, explored how obesity is strongly linked to fertility problems in men.Excess weight can contribute to dysregulation of the hypothalamic-pituitary-gonadal (HPG) axis — the hormone system that regulates testosterone production — and functional hypogonadism, a condition in which testosterone levels are abnormally low because of disrupted hormone signaling.
These changes can also impair semen quality.WEIGHT-LOSS MEDICATIONS COULD IMPACT SEXUAL HEALTH IN UNEXPECTED WAYSThe researchers evaluated how GLP-1 weight-loss drugs impact reproductive hormones and metabolic outcomes, analyzing data of men between the ages of 18 and 65 who were taking one of the medications, according to a press release.The systematic review of five randomized controlled trials focused on measuring testosterone, brain hormones involved in testosterone and sperm production, and a protein that carries sex hormones in the blood.
Semen quality, weight and BMI, cholesterol and blood sugar were also measured.The results suggested that GLP-1 medications do not suppress male hormones. Men with obesity and low testosterone linked to obesity may experience improved testosterone, sperm quality and metabolic health, especially during weight loss.
In one four-week study, dulaglutide showed no significant changes in reproductive hormones or sexual function.In a separate 16-week trial, liraglutide improved hormones in obese men with functional hypogonadism, meaning low testosterone was likely related to obesity. The review found that liraglutide was better for health outcomes than hormone replacement therapy.
CLICK HERE FOR MORE HEALTH STORIESAnother liraglutide study reported improved sperm concentration and count.A 24-week trial of semaglutide, known commercially as Ozempic and Wegovy, saw improvement in sperm shape and bad choleste
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