Iron during menstruation

Overview

Monthly bleeding can lower iron stores over time, especially if periods are heavy or prolonged. Iron needs are higher for some people during menstruation, pregnancy, and after blood loss.

What to know

Even without visible symptoms, repeated blood loss can reduce ferritin and haemoglobin over time. People who regularly bleed heavily may need more iron than is present in a standard diet.

Common blood tests

Ferritin, haemoglobin, MCV, transferrin saturation, and sometimes reticulocyte count or serum iron help show whether blood loss is causing iron deficiency or anaemia.

Signs to watch for

Fatigue, dizziness, poor concentration, pale skin, shortness of breath, hair shedding, brittle nails, and heavy or prolonged periods can all point to iron deficiency.

Lifestyle information

Iron-rich foods such as red meat, beans, lentils, fortified cereals, and leafy greens are useful. Pairing iron with vitamin C helps absorption, while tea, coffee, and calcium-rich foods can reduce absorption if consumed at the same time.

When to seek medical advice

Get checked if periods are very heavy, prolonged, or causing iron deficiency symptoms. Early treatment is important, because ongoing blood loss may need medical review rather than iron supplements alone.

Sources