Erectile dysfunction (ED) is a complicated condition involving many factors. Dozens of internal compounds and chemicals can influence your penile health and also impact other areas of your body.

One of those compounds is nitric oxide (NO). Keeping your NO levels healthy is a proven way to help prevent and treat ED.

"Nitric oxide appears to have a role in not only erectile dysfunction but also cardiovascular health and lung health," said Michael Ingber, M.D., a board-certified urologist with Garden State Urology in New Jersey.

What is nitric oxide?

Nitric oxide is a gas and a free radical, an unstable molecule that is a byproduct of chemical changes in a cell. NO has many functions in the body, such as dilating blood vessels, acting as a neurotransmitter, and relaxing the