Is there any evidence that arginine can prevent heart disease?

There is some evidence that daily intake of arginine may help prevent heart disease. However, these beneficial affects do not occur immediately and you must be on the supplement daily for many months and even years. It is believed that arginine prevents plaque formation and opens up blood vessels. If you have heart failure, then you are out of luck- Arginine has no benefit. Remember manufacturers advocate this supplement for many medical disorders but they only have one goal in mind- how to get you to spend money on their bogus supplements.