Some components are directly involved in plant metabolism. However, this precept does not account for the so-called helpful elements, whose presence, while not required, has clear positive effects on plant development. Here, be taught which meals are good sources of antioxidants. Good sources embody beef liver, oysters, potatoes, mushrooms, sesame seeds, and sunflower seeds. Good sources embody fortified cereals, beef liver, lentils, spinach, and tofu.