Last week I received an email from a former patient. He has hemochromatosis, an inherited disposition to iron overload. His body is programmed to take in excessive amounts of iron, which then might deposit in the liver, glands, heart and skin. He mentioned “some amazing videos on hematology and hemochromatosis and genetics” he’d discovered on YouTube.

This is the future of medicine, I realized. … Whether physicians want their patients to search the Internet for medical advice is beside the point. We’re there already, whether or not it’s good for us and whether what we find there is true.