Arginine is one of the compounds responsible for helping blood vessels contract and expand, helping to control blood flow. Most people get all the arginine they need by eating a healthy diet.
Sometimes, people need extra arginine in their bodies to help with special medical conditions. A doctor may suggest arginine supplements for those suffering from conditions such as coronary heart disease, congestive heart failure, erectile dysfunction, high blood pressure or clogged arteries according to Healthline.
Studies are being conducted on the effectiveness of arginine to help with other conditions like diabetes, and immune system regulation. Arginine is also sometimes prescribed, with ibuprofen, as a treatment for migraines.