On the periodic table of elements, the symbol Mn stands for the element manganese. Manganese is a mineral element that is both potentially toxic and nutritionally essential to organisms.
Manganese plays important roles in many physiologic processes including antioxidant function, metabolism, bone development and nutrient interactions. Low levels of manganese in the blood can be associated with diseases and disorders such as osteoporosis, diabetes mellitus and epilepsy. Manganese can be found in many foods, including pineapples, pecans, almonds, tea, spinach and brown rice. There are several forms of manganese found in supplements, including manganese sulfate, manganese gluconate, amino acid chelates of manganese and manganese ascorbate.