The overall prevalence of erectile dysfunction in men aged ≥20 years was 18.4% suggesting that erectile dysfunction affects 18 million men in the US alone. Among men with diabetes, the prevalence of erectile dysfunction was 51.3%. ED can have a neurogenic, psychogenic, or endocrinologic basis, but the most common cause is thought to be related to vascular abnormalities of the penile blood supply and erectile tissue often associated with cardiovascular disease and its risk factors. Listen to this podcast to find out about the prevalence of, and solutions for, erectile dysfunction. Bibliography 0:05:19    Prevalence and risk factors for erectile dysfunction in the US. 0:11:51    The circadian timing system and environmental circadian disruption: From follicles to fertility. 0:15:11    Is Internet Pornography Causing Sexual Dysfunctions? A Review with Clinical Reports. 0:21:36    Fathers have lower salivary testosterone levels than unmarried men. 0:24:21    Physiological consequences of U.S. Army Ranger training. 0:34:14    Irritable bowel syndrome is associated not only with organic but also psychogenic erectile dysfunction.