"It's not nerve damage," my endocrinologist said, leaning forward.
"What you're experiencing is vascular decline. It happens to most diabetic men after 50."
He drew three quick circles on his notepad.
"First, your blood sugar damages the endothelium—the one-cell-thick lining of your blood vessels."
"Second, those damaged vessels can't expand like they used to. Blood can't flow properly."
"Third, the smallest vessels fail first. That's why you're having problems getting hard while your heart still seems fine."
"So this isn't just aging?" I asked.
"Exactly. It's circulation breakdown. And there's a natural compound that fixes it—without Viagara dependency."