a quart of it a day. The Power of NO Nitric oxide (NO) is a key biological messenger within the body, and its message is: “Open Sesame!” When released by your endothelium (the cells lining your arteries), it signals the muscle fibers within the walls of your arteries to relax, allowing them to open up and for more blood to flow. That’s how nitroglycerin pills work: The nitroglycerin people take when they’re
