Ferrous gluconate is effectively used in the treatment of hypochromic anemia. The use of this compound compared with other iron preparations results in satisfactory reticulocyte responses, a high percentage utilization of iron, and daily increase in hemoglobin that a normal level occurs in a reasonably short time. Ferrous gluconate is also used as a food additive when processing black olives. It imparts a uniform jet black colour to the olives. This product is one of the main ingredients for constructing hemoglobin, myoglobin and cell chromatin. This product is used in iron-deficiency anemia and good food hardening agent.