Diabetes is one of the most widespread health threats in America today. About 34 million Americans have diabetes—fully 10 percent of the U.S. population—while another 88 million adults are prediabetic, according to estimates from the Centers for Disease Control and Prevention (CDC).

While it's rarely discussed, one of the most common side effects of diabetes is erectile dysfunction (ED). And it doesn't only affect men who have been diagnosed with diabetes; studies indicate that men who merely have genetic risk factors for type 2 diabetes are more likely to develop ED at some point in their life.

So what is the science that links