Iron overdose is one of the most dangerous supplement toxicities. Learn the warning signs (GI distress, organ damage), safe upper limits by country, and when to seek emergency help.
Acute iron overdose is dangerous; chronic excess can damage the liver, heart, and pancreas.
| Standard | RDA | Upper Limit (UL) |
|---|---|---|
| US (FDA) | 18 mg | 45 mg |
| EU (EFSA) | 18 mg | 45 mg |
| AU (TGA) | 18 mg | 45 mg |
| CN (CNS) | 20 mg | 42 mg |
| JP (MHLW) | 10.5 mg | 50 mg |
RDA = Recommended Dietary Allowance. UL = Tolerable Upper Intake Level. Exceeding the UL long-term may cause the toxicity symptoms described above.
Acute iron overdose can cause severe vomiting, abdominal pain, and even organ failure. Chronic excess damages the liver, heart, and pancreas. The UL is 45 mg/day for adults. Iron supplements should only be taken when a deficiency is confirmed by blood test.
Yes. Acute iron overdose (especially in children) is a medical emergency. Symptoms include severe vomiting, diarrhea, abdominal pain, and lethargy. Call emergency services or go to the ER immediately if you suspect iron overdose.
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Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.