By Dr Pranab Gyawali, Consultant Gastroenterologist
Introduction
Hair loss is a common concern, often attributed to age, stress, or genetics. However, when it occurs unexpectedly or at a younger age, it’s worth considering nutritional causes — particularly iron and vitamin B12 deficiencies. These nutrients are essential for healthy red blood cell formation and oxygen delivery to hair follicles. When levels drop, hair can become thin, weak, or shed more easily.
This short video explains how simple blood tests can identify hidden deficiencies and guide effective treatment.
1. Can Low Iron Cause Hair Loss?
Yes. Iron deficiency, especially when ferritin (iron storage) levels are low, is a recognised cause of diffuse hair shedding (telogen effluvium). When the body runs low on iron, it diverts oxygen and nutrients to essential organs, causing hair follicles to enter a resting phase and shed.
Once iron levels are restored through diet or supplements, hair growth usually resumes within a few months. The underlying cause of deficiency should always be investigated.
Read more about Iron Deficiency in Dubai
2. Does Vitamin B12 Deficiency Lead to Hair Loss?
Yes. Vitamin B12 plays an important role in DNA synthesis and cell division within hair follicles. Low levels can make follicles less active, resulting in weaker hair shafts and slower regrowth. This is particularly common among vegetarians, people with restricted diets, or individuals with gut absorption issues.
3. How Do I Know If My Hair Loss Might Be Due to Deficiency?
- Gradual, diffuse hair thinning rather than patchy loss
- Persistent fatigue, pale skin, or brittle nails
- Diet low in animal-based foods
- History of gastritis, celiac disease, or Crohn’s disease
- Use of acid-suppressing medication or metformin
4. Which Blood Tests Should Be Done?
These tests help detect iron and B12 deficiencies that can affect hair growth:
- Serum ferritin (iron stores)
- Serum iron, TIBC, and transferrin saturation
- Hemoglobin and red cell indices
- Vitamin B12 and folate levels
5. What Is the Link Between Gut Health and Nutrient Absorption?
Even with a healthy diet, some people develop deficiencies due to reduced absorption in the gut. Conditions like celiac disease, Crohn’s disease, and chronic gastritis can limit absorption of both iron and vitamin B12, leading to persistent low levels. Treating these conditions is key to preventing recurrence.
6. How Long Does It Take for Hair to Regrow After Correction?
Hair regrowth typically becomes noticeable after three to six months of treatment. However, recovery may take longer if the deficiency has been longstanding or if underlying absorption issues are not addressed.
7. When Should You Get Tested?
If you experience ongoing hair thinning, tiredness, or other symptoms suggestive of deficiency, it’s worth checking your iron and B12 levels. Early detection allows treatment before hair loss becomes significant.
Conclusion
Hair loss is common, but when it occurs unexpectedly or with fatigue and other deficiency signs, low iron or B12 levels could be the cause. A simple blood test can identify the problem and guide treatment. If you wish to get checked for these deficiencies or assess your gut health, please use the contact form below to arrange an appointment.