Is 65 mg of iron too much?

65 milligrams of iron is above the adult upper limit of 45 milligrams a day. Adults need 8 milligrams for men, 18 milligrams for women aged 19 to 50, and 8 milligrams for women over 50. Doctors sometimes advise more for a set time, so check with yours before taking this much.

Checked 28 September 2026 · Sources: NIH Office of Dietary Supplements fact sheet and NHS vitamins and minerals guidance · Adults onlyUS: Above the upper limitUK: Above NHS guidance

General information, not medical advice. Check with a doctor or pharmacist before taking a supplement, especially if you are pregnant or breastfeeding, take any medicine, or are under 18.

In the UK

65 milligrams of iron is above the NHS guidance of 17 milligrams a day from supplements (unless a doctor has prescribed more). In the UK, adults need 8.7 milligrams a day for men and women over 50, and 14.8 milligrams for women aged 19 to 49. Doctors sometimes advise more for a set time, so check with yours before taking this much.

The figures

US (NIH)UK (NHS)
Amount checked65 mg
AnswerAbove the upper limitAbove NHS guidance
Compared with45 milligrams a day17 milligrams a day from supplements
Share of the limit144% of the limit382% of the limit
Adults need8 milligrams for men, 18 milligrams for women aged 19 to 50, and 8 milligrams for women over 508.7 milligrams a day for men and women over 50, and 14.8 milligrams for women aged 19 to 49

Good to know

Quick answers

Is 65 mg of iron too much?
65 milligrams of iron is above the adult upper limit of 45 milligrams a day. Adults need 8 milligrams for men, 18 milligrams for women aged 19 to 50, and 8 milligrams for women over 50. Doctors sometimes advise more for a set time, so check with yours before taking this much.
What does the NHS say about 65 mg of iron?
65 milligrams of iron is above the NHS guidance of 17 milligrams a day from supplements (unless a doctor has prescribed more). In the UK, adults need 8.7 milligrams a day for men and women over 50, and 14.8 milligrams for women aged 19 to 49. Doctors sometimes advise more for a set time, so check with yours before taking this much.
What is the upper limit for iron?
US: 45 milligrams a day. UK (NHS): 17 milligrams a day from supplements.

Sources

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