Garlic supplementation for 1 year lowered the risk of heart attack by 26.1% in men at high risk for heart attack.

Garlic contains many organosulfur compounds that potently reduce inflammation in the endothelial cells that line the blood vessels. Garlic cooking tip: When garlic is chopped or crushed it activates (releases an enzyme) called alliinase which then forms an organosulfur compound called allicin. Alliinase is heat sensitive chopped garlic sit for a few minutes so the allicin can form before cooking. Unfortunately, I do not have access to the full paper so I do not know the dose used in this study. But another study found that supplementation with 2.4 g of aged garlic was able to slow plaque accumulation in arteries by 80%.