Strasbourg: The dietary supplement, L-arginine, has been shown to improve heart health ina new study fromthe Institut de Physiologie in France.

L-arginine, is an amino acid and a precursor of nitric oxide, which supports the arteries. Dysfunction of this pathway reduces blood flow and limits physical activity.

The researchers gave L-arginine to six patients with chronic heart failure for a period of six weeks. The patients were subjected to endurance exercise tests. It was found that those taking the amino acid had a significant decrease in their average heart rate. But their blood pressure and respiratory parameters remained unchanged.