cinnamon. Cinnamon is a great source of antioxidants. As is true for a lot of spices, cinnamon provides nutrition without calories. Some herbs and spices, including cinnamon, are so rich in antioxidants that just a small pinch can double your antioxidant intake for one meal.Cinnamon is also one of the cheapest source antioxidants you can buy.innamon. Cinnamon is a great source of antioxidants. As is true for a lot of spices, cinnamon provides nutrition without calories. Some herbs and spices, including cinnamon, are so rich in antioxidants that just a small pinch can double your antioxidant intake for one meal.