People suffering from clogged arteries sometimes notice improvement in blood flow after taking arginine, which is good news for those with coronary artery disease or angina, notes WebMD. However, the evidence remains incomplete as of 2015, and no long-term studies on arginine use have taken place.
Inside the body, arginine transforms into nitric oxide. This neurotransmitter facilitates relaxation in the blood vessels, boosting circulation. Additional benefits that affect people with heart problems include a potential decrease in blood pressure, but more research is necessary to substantiate those claims. This relaxation of the arteries has the potential to help people with erectile dysfunction as well, reports WebMD.