Nitric oxide plays an important role in vasoregulation (the opening and closing of blood vessels), homeostasis (the way in which the body maintains a state of stable physiological balance in order to stay alive), neurotransmission (the messaging system within the brain), immune defense, and respiration. It helps to prevent high blood pressure, lower cholesterol, keep the arteries young and flexible, and prevent the clogging of arteries with plaque and clots. All these benefits reduce your risk of heart attack and stroke—two
