This document summarizes several important minerals, their dietary sources, recommended daily allowances, functions in the body, and deficiency diseases. It discusses major minerals like sodium, potassium, calcium, phosphorus, and magnesium. It also covers trace minerals including iron, copper, zinc, selenium, iodine, chromium, fluoride, manganese, and molybdenum. Key deficiency diseases explained are rickets, osteomalacia, anemia, and goiter.