Guide

Iron for fatigue and low haemoglobin

Prepared by the LekCheck team · Last reviewed: 2026-06-29 · How we create our content

Iron is needed to build haemoglobin, which carries oxygen in the blood. Iron supplements are taken mainly for a proven iron deficiency, not "just in case" — taking them without need can be harmful. Below are the ingredients often discussed for fatigue and low haemoglobin; choose one to compare products and prices. A test and a consultation are recommended before taking them.

This guide was prepared by the LekCheck team and has not been reviewed by a doctor or pharmacist. This article is for general information only and is not medical advice, diagnosis, or treatment. Do not start, stop, or change any treatment without consulting a doctor or pharmacist.

Iron

Iron supplements are taken for a proven deficiency and usually after a blood test. The dose and duration depend on the values and on tolerance — iron can cause stomach complaints and constipation. Do not start taking it without proper judgement.

Folic acid and vitamin B12

Folic acid and vitamin B12 are also involved in blood formation and are sometimes discussed together with iron. The type of anaemia determines which is appropriate — which is why a test matters, not random self-treatment.

When to see a doctor

See a doctor for marked fatigue, pallor, breathlessness on exertion, a fast pulse, dizziness or if you suspect anaemia — to establish the cause before taking supplements. Also consult in pregnancy, heavy periods, gastrointestinal complaints or unexplained weight loss.