Best Iron Mineral Supplements AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (line): Solgar Gentle Iron
Iron bisglycinate at a moderate dose causes less constipation and nausea than ferrous sulfate, so people keep taking it.
Not for: Anyone without confirmed low iron or ferritin, adult men and postmenopausal women without testing, and people with hemochromatosis.
AI picks by need
For cheapest well-studied form, or a doctor specified ferrous sulfate
Slow Fe (brand)
Slow-release ferrous sulfate, the form most clinical guidance is built on.
Not for: People who get GI side effects from ferrous sulfate.
For bisglycinate with sport certification
Thorne Iron Bisglycinate (line)
Chelated iron from a brand with third-party sport testing.
Not for: Anyone needing larger doses prescribed for anemia.
What the AI looks for in Iron Mineral Supplements
- Test first
- Supplement based on ferritin and hemoglobin results, not symptoms alone. Iron overload damages organs, and fatigue has many other causes.
- Elemental iron
- Adult upper limit is 45 mg/day elemental unless prescribed. Compare the elemental amount on labels. The compound weight overstates the real dose.
- Absorption
- Take away from calcium, coffee, tea and dairy, ideally with vitamin C. Alternate-day dosing can absorb better. Absorption is easily blocked and is regulated by the hormone hepcidin.
- Child safety
- Store out of children's reach. Accidental iron overdose is a leading cause of fatal poisoning in young children.
Brands that matter
- Solgar: Gentle Iron bisglycinate.
- Slow Fe: Slow-release ferrous sulfate.
- Thorne: Iron bisglycinate.
- Floradix: Liquid iron with herbs for people who can't swallow pills.
What to avoid
- Taking iron with calcium supplements
- High-dose iron without a diagnosis
- Leaving iron supplements where children can reach them
Questions
Why does my 325 mg ferrous sulfate tablet only have 65 mg of iron?
325 mg is the weight of the whole salt. The elemental iron, which is what counts, is about 65 mg.