❓ Which form of iron supplement is best absorbed?

Research indicates that ferrous iron forms are better absorbed than ferric iron. The most common and well-studied forms include:

• Ferrous sulfate: Most commonly prescribed, 20% elemental iron
• Ferrous gluconate: Gentler on stomach, 12% elemental iron
• Ferrous bisglycinate: Higher absorption rate, fewer side effects

Newer formulations like iron carbonyl and heme iron polypeptides show promising absorption rates with fewer side effects. The best form for you depends on factors like tolerance, cost, and specific medical needs. Some people find liquid forms easier to tolerate than tablets.