Ferrous Sulfate

Ferrous sulfate is a form of the mineral iron. It is an inorganic salt that can be produced synthetically by reacting iron with sulfuric acid or obtained from naturally occurring iron ores.

Manufacturers add ferrous sulfate to foods as a nutrient, specifically to fortify products with iron. It is commonly found in enriched grain products like pasta, cereals, and flours, as well as in some infant formulas and nutritional drinks.

Ferrous sulfate is an FDA-approved nutrient additive used to supplement iron in foods. Iron is an essential mineral, and ferrous sulfate is a common and effective source. At typical intake levels from fortified foods, it is generally recognized as safe. However, excessive intake of iron can lead to gastrointestinal upset, including nausea, vomiting, and constipation. JECFA (the Joint FAO/WHO Expert Committee on Food Additives) has evaluated iron compounds, including ferrous sulfate, and determined that an acceptable daily intake could not be specified, as iron is an essential nutrient and the amount needed varies. EFSA (the European Food Safety Authority) has also evaluated iron sources and their safety.