The Endocrine Society Jun 15 2026 GLP‑1s do not harm male hormones or fertility after long-term use, according to a study being presented Monday at ENDO 2026, the Endocrine Society's annual meeting in Chicago, Ill. In fact, the research team found GLP-1s may improve testosterone levels and sperm quality in men with obesity‑related low testosterone, while also addressing the underlying effects of obesity. Scientists at the University Hospitals Coventry and Warwickshire and Warwick Medical School