Most male health researchers have refocused their studies on ED. They are concerned that in most men, the problem of erectile dysfunction may be more physiological rather than psychological.
By carefully examining the arteries of men with ED, it was discovered that there is more flexibility in the arteries of men without erectile dysfunction. Conversely, lower flexibility of arteries reduces blood flow through critical blood vessels.
Furthermore, as blood flows through the vascular system, nitric oxide is absorbed through the inner layers of the vessels, which makes them expand, facilitating better blood flow. Nitric oxide is the key to erectile dysfunction. Hence, reduced blood flow to the penis means a reduced nitric oxide uptake.
Nitric oxide is also an anti-atherosclerotic compound that prevents hardening of the arteries, which causes cardiovascular disease.