Heart Factors Plus has been designed to support a healthy heart, cardiovascular function and helps support healthy blood pressure levels. It contains an amino acid called Arginine which boosts the body’s production of Nitric Oxide. As this happens, it can have a dramatic and positive effect on your cardiovascular health. Arginine is a precursor of Nitric Oxide which increases blood flow and relaxes the smooth muscles around the body. It also increases blood flow in penile tissue which leads to erection. The effect is more pronounced in men with low Nitric Oxide levels.