Health · Evidence Strong
Iron (Bisglycinate)
A gentle iron form — only supplement if a blood test confirms deficiency.
Dosage
Only as directed by a physician after a serum ferritin test
Timing
Away from coffee, tea, calcium, and dairy
Evidence
Strong
Overview
Iron is one of the few supplements that should never be self-prescribed. Get a ferritin test first. If you are deficient, bisglycinate is generally better tolerated than ferrous sulfate.
Benefits
- →Corrects diagnosed iron deficiency
- →Supports oxygen transport when levels are low
Best for
Stacks with
Side effects
- • Constipation
- • Nausea
- • Dark stools
Warnings & cautions
- ⚠Do not supplement iron unless a blood test confirms deficiency.
- ⚠Iron overload is dangerous — hemochromatosis and other conditions require caution.
- ⚠Keep away from children — iron overdose is a leading cause of pediatric poisoning.
- ⚠Discuss with a physician if pregnant or breastfeeding.
Drug & condition interactions
- • Reduces absorption of certain antibiotics, thyroid medication, and levodopa — separate dosing.
Evidence notes
Iron corrects deficiency and iron-deficiency anemia. Supplementing without deficiency can cause harm.
Research references
- [1] Camaschella C. Iron-deficiency anemia. — N Engl J Med, 2015; 372:1832–1843
Medical disclaimer
This page is for general educational purposes only and is not medical advice. Individual response to supplements varies. Consult a licensed healthcare provider before starting any supplement — especially if you are pregnant, breastfeeding, under 18, taking prescription medication, or managing a medical condition.
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