If you think garlic is simply used to flavor Mediterranean dishes -- or that it's a charm to ward off vampires -- then think again. Garlic is an herb that's used as a dietary supplement and may have significant benefits when it comes to heart health. According to the National Institutes of Health (NIH), studies have shown that garlic can reduce blood pressure by as much as 8 percent in people who already experience high blood pressure. Other research indicates that garlic may have a slight effect on lowering cholesterol and may reduce atherosclerosis, or the hardening of arteries with age. All of these factors contribute to a healthier heart and may reduce the risk of heart disease. Some studies have also determined that eating garlic as part of your diet can reduce the risk of developing certain types of cancer, including colon, rectal and stomach cancers. While no clinical studies have confirmed the power of garlic supplements to fight cancer, the likely benefits of garlic make it a no-brainer for this list of important supplements.