Garlic
Allicin, an ingredient of garlic, is both a natural antibiotic, shown to be effective in fighting against cardiovascular disease. Many studies have shown allicin decreases hypertension by as much as 30 points. And, according to a clinic study at UCLA, garlic may help prevent strokes by slowing arterial blockages and lowering levels of homocysteine, a chemical that leads to plaque buildup.