Tuesday 28 June 2022 12:51 AM DR MARTIN SCURR answers your health questions  trends now

A couple of years ago my daughter, who is in her 30s, started feeling very tired and had problems tripping while running. 

Her doctor diagnosed iron deficiency anaemia and prescribed iron tablets for three months. This sorted the problem, but in recent weeks she has been tired and is stumbling again. Why is this happening?

P.A. Berry, Hertfordshire.

I suspect there are several factors implicated here.

The average adult has around 4 g of iron in their body, 70 per cent of which is found in haemoglobin, the oxygen-carrying pigment in red blood cells.

Iron deficiency anaemia occurs when haemoglobin drops below 11.5g/dL in women and 13.5g/dL in men, and is where the iron stores are too low to produce red blood cells in their normal quantity (each lives for only 120 days).

As red blood cells carry oxygen around the body, this can lead to tiredness and breathlessness —your daughter’s tripping may be due to this weariness.

Each day we lose around 1mg of iron through natural shedding of skin cells, hair and the mucosal tissue that lines the intestines, which is constantly being renewed. Women who menstruate lose 2mg or so daily during their periods.

And your daughter may also be losing iron by running, as studies show athletes can shed it through exercise-induced sweating.

You say in your longer letter that she has a healthy diet, which will help, but there is a limit to the amount of iron that can be absorbed via the intestines.

So when iron stores drop, it is hard to get them back again without supplementation.

My advice would be for her to take a daily full-strength (300mg) iron supplement, available over the counter, until her haemoglobin is well above 11.5g/dL (her GP will need to do a blood test for this) and then take a tablet (the same high dose) once or twice weekly on a long-term basis.

You also say your daughter has been a blood donor and would like to do so again. Being anaemic rules out the immediate possibility of that — those who donate are required to have a relatively high haemoglobin level. Nevertheless, I salute her good intentions.

For the past six months, I’ve been suffering with rosacea — I get a very red face that seems worse after a meal or hot drink. I’ve tried a gel and four creams, but nothing relieves it. I’m considering seeing a dermatologist

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