Some embodiments relate to metal chelators for preparing food products (including nutritional supplements) from vegetable and plant sources having reduced metal content. In some embodiments, the plant sources include rice. In some embodiments, when complexed to a metal to be removed, the metal chelators are water soluble and can be separated (e.g., rinsed, etc.) from the food material during processing. In some embodiments, the metal chelators are organic certifiable.
