HealthStylz

Supplements

Iron

Oxygen transport and preventing anemia.

Well studied

You need a day
18 mg
women 19 to 50 (men 19 and over: 8 mg; women 51 and over: 8 mg)
Most pills have
18 mg
Safe max a day
45 mg
adults 19 and over
Careful studies
1,698
58 in 2025, 70 in 2015
A bowl of hearty bean chili with avocado and warm flatbreadPhoto: Magda Ehlers

What the research says

The short version

Iron is a core part of hemoglobin, and supplements correct iron deficiency and iron deficiency anemia. Most US adults get enough from food, and young children, teen girls and pregnant women are at higher risk of low intake.

Iron overdose has caused child poisoning deaths, doses of 45 mg a day or more can cause nausea and constipation, and people with hemochromatosis should avoid extra iron.

About "most pills": NIH ODS: multivitamins made for women typically provide 18 mg iron; iron-only supplements often provide 65 mg.

Sources: ods.od.nih.gov

Who is reading about it

About 64 people a day read about Iron

That is -4% compared with the month before. The busiest day lately was Aug 31, 2026.

Wikipedia article "Iron supplement", daily readers, last 90 days.

Our stories

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