HealthMap

Iron Supplement Forms and Ferrous Sulfate

• Ferrous Sulfate is the most widely prescribed, inexpensive, and commonly used conventional iron salt for treating iron deficiency anemia.
• It is typically available in standard tablets, capsules, and liquid drops, often containing about 20% elemental iron by weight.
• Common conventional prescription and over-the-counter strengths include 325 mg tablets, which deliver approximately 65 mg of elemental iron.
• While widely used, this conventional inorganic salt form frequently causes significant gastrointestinal side effects, such as nausea, abdominal cramping, constipation, and diarrhea, due to poor absorption and unabsorbed iron irritating the intestinal lining.
• From a nutritional balance perspective, high doses of poorly absorbed inorganic iron can also interfere with the absorption of other essential trace minerals like zinc, copper, and manganese.
• Safer, more bioavailable, and gentler alternatives often preferred in nutritional approaches include iron bisglycinate (ferrous chelate), which is significantly better absorbed and less likely to cause digestive distress or mineral antagonisms.