Your Iron Journey: From Symptoms to Answers

Iron deficiency often develops gradually. Many people assume their symptoms are simply part of modern life and never recognise the underlying cause.^1,2 A typical pathway looks something like this.

Stage 1: Early iron depletion

Iron stores begin to fall and ferritin levels decline.^3,4 At this point haemoglobin may still be normal, and routine health checks can look reassuring.

Common symptoms include:

• Tiredness
• Poor recovery from exercise
• Reduced concentration
• Brain fog
• Lower motivation
• Increased fatigue after physical activity

Many people put these down to stress, ageing or a busy lifestyle.

Stage 2: Iron deficiency without anaemia

As ferritin continues to fall, symptoms often become more noticeable:

• Persistent fatigue
• Reduced exercise performance
• Hair shedding
• Poor sleep quality
• Restless legs
• Headaches
• Feeling cold
• Reduced productivity

This stage is particularly common among:

• Women with heavy periods
• Endurance athletes
• Vegetarians and vegans
• Frequent blood donors
• People with poor iron absorption

Importantly, haemoglobin may still be within the normal range.⁷

Stage 3: Iron deficiency anaemia

Once iron stores are severely depleted, the body struggles to make haemoglobin. Symptoms may progress to include:

• Marked exhaustion
• Breathlessness
• Dizziness
• Palpitations
• Reduced exercise tolerance
• Pale skin
• Spoon-shaped nails (koilonychia)

At this stage the picture is often clearer, but ideally iron deficiency should be picked up much earlier.^5,6

Stage 4: Investigation and treatment

A thorough assessment should answer three questions:

1. Is iron deficiency present?
2. What is causing it?
3. What is the most appropriate treatment?

Testing may include:

• Ferritin
• Full blood count (FBC)
• Serum iron
• Transferrin saturation (TSAT)
• Total iron-binding capacity (TIBC)
• C-reactive protein (CRP)
• Vitamin B12
• Folate

Understanding the cause is critical. Low iron is a finding in its own right, but it is also a clue that warrants further investigation.^5,9

Stage 5: Recovery and monitoring

Once iron deficiency has been identified, treatment may involve:

• Changes to diet
• Oral iron supplements
• Intravenous iron where appropriate
• Investigating and treating the underlying cause

Many people notice more energy within several weeks, although fully restoring iron stores can take several months. Monitoring ferritin shows whether stores have genuinely recovered, rather than just haemoglobin being corrected.^8,10

Who should consider ferritin testing?

You may benefit from ferritin testing if any of these apply:

• Persistent fatigue
• Brain fog or poor concentration
• Reduced athletic performance
• Hair thinning or excessive shedding
• Heavy menstrual bleeding
• A vegetarian or vegan diet
• Frequent blood donation
• Restless legs
• Unexplained breathlessness
• A previous history of iron deficiency

Because ferritin reflects stored iron, it is often the earliest blood marker to show that iron levels are falling.

Ferritin testing at Chxhealth

At Chxhealth, we believe fatigue should never simply be dismissed as "being busy". Our iron testing is designed to help identify depleted iron stores before significant anaemia develops.

Testing can be valuable for:

• Women of reproductive age
• Athletes and active people
• Perimenopausal women
• Vegetarians and vegans
• People with ongoing fatigue
• Anyone concerned about their metabolic health

Your report shows each marker alongside its reference range, making it easier to see whether a low ferritin reading may reflect low stores, or whether other markers such as CRP suggest something else is going on. You can then take the results to your GP or healthcare professional.

Rather than following social media trends such as "ferritin face", we focus on evidence-based laboratory assessment of iron stores and nutritional health.

Take the next step

If you are experiencing ongoing tiredness, reduced exercise performance, brain fog, hair loss or other unexplained symptoms, checking your iron status is a sensible place to start. A simple blood test measuring ferritin and related iron markers gives a clear view of your body's iron reserves.

Book your Anaemia Profile with Chxhealth and find out whether low iron could be affecting your energy, performance and wellbeing.

This article is informational. Chxhealth is a biomarker and genetic data provider. We do not diagnose, treat or prescribe. If your results are outside typical ranges, talk to your GP or a healthcare professional about next steps.

References

1. Pasricha SR, Tye-Din J, Muckenthaler MU, Swinkels DW. Iron deficiency. Lancet. 2021;397(10270):233–248.
2. Camaschella C. Iron deficiency. Blood. 2019;133(1):30–39.
3. Camaschella C, Nai A, Silvestri L. Iron metabolism and iron disorders revisited in the hepcidin era. Haematologica. 2020;105(2):260–272.
4. Ganz T, Nemeth E. Iron homeostasis in host defence and inflammation. Nat Rev Immunol. 2015;15(8):500–510.
5. Auerbach M, Adamson JW. How we diagnose and treat iron deficiency anemia. Am J Hematol. 2016;91(1):31–38.
6. Lopez A, Cacoub P, Macdougall IC, Peyrin-Biroulet L. Iron deficiency anaemia. Lancet. 2016;387(10021):907–916.
7. Sim M, Garvican-Lewis LA, Cox GR, et al. Iron considerations for the athlete: a narrative review. Sports Med. 2019;49(Suppl 2):S3–S17.
8. McCormick R, Sim M, Dawson B, Peeling P. Refining treatment strategies for iron deficient athletes. Sports Med. 2020;50(12):2111–2123.
9. Bacon BR, Adams PC, Kowdley KV, Powell LW, Tavill AS. Diagnosis and management of haemochromatosis. Hepatology. 2011;54(1):328–343.
10. Pavord S, Daru J, Prasannan N, Robinson S, Stanworth S, Girling J. UK guidelines on the management of iron deficiency in pregnancy. Br J Haematol. 2020;188(6):819–830.