2. Vitamin C
Except boosting your immune system, vitamin C does a lot more than that. It helps to reduce concentrations of C-reactive protein in the blood, which lowers heart-disease causing inflammation. It is also powerful antioxidant. Vitamin C helps the coronary arteries function properly, and there is some evidence it may help lower cholesterol as well. The recommendation is to take up to 2,000 milligrams of vitamin C daily.