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Label data · how much iron in an iron supplement

Iron: mg per serving on every iron label we carry

Iron labels print 18 mg to 65 mg of elemental iron per tablet, and the form (ferrous sulfate, bisglycinate, food-based) changes how it sits on the stomach more than how much iron it delivers. The table lists the printed elemental iron per serving for every iron product we track.

3 labels we read

Lowest
25 mg
Median
26 mg
Highest
65 mg

Iron per serving as printed on the Supplement Facts panel of each product below · 2 of them print a third-party certification.

What to check on the label

  • Elemental iron per serving (65 mg ferrous sulfate = 325 mg of the compound)
  • Form: sulfate (cheapest), bisglycinate (gentler), food-based (lower dose)
  • The warning: keep away from children — accidental overdose is a leading cause of poisoning in under-6s

Keep out of reach of children; iron overdose is dangerous. Take iron only if a blood test and a doctor say you need it.

Iron on each label we carry

Sorted by the printed amount. Tap a row to see it on eBay; the product page has the full label.

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  1. Nature Made Iron 65 mg Tablets

    Nature Made Iron 65 mg Tablets

    Iron: 65 mg per serving · USP Verified

    Things to consider: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six. Keep out of reach of children. Intended for short-term use as determined by a physician — don't take high-dose iron without a blood test.

    Iron 65 mgForm Ferrous sulfateAmazon Full facts →
  2. MegaFood Blood Builder

    MegaFood Blood Builder

    Iron: 26 mg per serving

    Iron 26 mgServing 1 tabletAmazon Full facts →
  3. Thorne Iron Bisglycinate 25 mg

    Thorne Iron Bisglycinate 25 mg

    Iron: 25 mg per serving · NSF Certified for Sport

    Things to consider: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under six. Keep out of reach of children.

    Iron 25 mgForm Bisglycinate chelateAmazon Full facts →

Go deeper

Questions people ask

How much iron is in a 325 mg ferrous sulfate tablet?

65 mg of elemental iron — the label prints both numbers. Bisglycinate products usually print 18–25 mg; food-based ones 18–26 mg.

Which iron is easiest on the stomach?

Bisglycinate (chelated) is the form most labels market as gentle; sulfate is the standard pharmacy form. Dose and timing with food matter as much as the form — ask your doctor.

Part of the open label dataset (CC BY 4.0) · how we read labels · other ingredients: Creatine monohydrate · Whey protein · Plant protein · Collagen peptides · Magnesium · Melatonin · Ashwagandha · Vitamin D3