Nitric Oxide is critically important for maintaining a healthy vascular system in our body. It dilates blood vessels, expands arteries, and improves blood flow through various other mechanisms. Increasing nitric oxide levels is not only beneficial for cardiovascular health but also for athletic performance. Nitric oxide level can be increased after a few hours of the consumption of leafy green vegetables, as they are turned into nitrites and then nitric oxide inside our body. Here are some vegetables that are rich in natural nitrates: Arugula lettuce, Spinach, Beets, Basil and Cilantro.