Understanding MCH in Blood Tests
Know about mch in blood tests, its symptoms, causes and how to improve the mch levels.
Written by Dr. Rohinipriyanka Pondugula
Reviewed by Dr. Siri Nallapu MBBS
Last updated on 29th Jul, 2025
Introduction
When you get a blood test, you might notice a term called MCH in your report. It stands for Mean Corpuscular Haemoglobin, which is a measure of the average amount of haemoglobin in your red blood cells. Haemoglobin is the protein that carries oxygen throughout your body, so MCH helps doctors understand how well your blood is functioning.
If you're wondering why MCH levels matter or what abnormal results could mean, this article will guide you through everything in simple terms.
What Does MCH Mean in a Blood Test?
MCH is part of a Complete Blood Count (CBC), a common test that checks your overall health. It tells doctors how much haemoglobin is present in each of your red blood cells on average.
- Normal MCH Range: Typically between 27 to 33 picograms (pg) per cell.
- Low MCH: Below 27 pg – may indicate anaemia or iron deficiency.
- High MCH: Above 33 pg – could suggest vitamin deficiencies or other conditions.
Consult a Top General physician
What Causes Abnormal MCH Levels?
- Low MCH (Hypochromia)
- If your MCH is low, your red blood cells have less haemoglobin than normal. Common causes include:
- Iron Deficiency Anaemia – The most common reason. Without enough iron, your body can't make sufficient haemoglobin.
- Chronic Diseases – Conditions like kidney disease or infections can affect haemoglobin production.
- Blood Loss – Heavy periods, ulcers, or injuries may lead to low iron and MCH.
- High MCH (Hyperchromia)
If MCH is higher than normal, it could mean:
1. Vitamin B12 or Folate Deficiency – These vitamins help produce healthy red blood cells.
2. Liver Disease – Affects how haemoglobin is processed.
3. Certain Medications – Some drugs can increase MCH levels.
Symptoms of Abnormal MCH Levels
Depending on whether your MCH is high or low, you may experience:
- Low MCH Symptoms
- The low mch symptoms include:
- Fatigue and weakness
- Pale skin
- Shortness of breath
- Dizziness
- Cold hands and feet
- High MCH Symptoms
- The high mch symptoms include:
- Fatigue
- Tingling in hands or feet (due to nerve damage in B12 deficiency)
- Memory problems
- Digestive issues
How to Improve MCH Levels
If your MCH is abnormal, your doctor may recommend further tests to find the exact cause. However, some general tips can help improve your levels:
- For Low MCH (Iron Deficiency)
- Eat iron-rich foods: Spinach, lentils, red meat, beans, and fortified cereals.
- Vitamin C helps absorption: Pair iron-rich foods with oranges, tomatoes, or bell peppers.
- Avoid coffee/tea with meals: They can block iron absorption.
- Iron supplements: If prescribed by a doctor.
- For High MCH (B12/Folate Deficiency)
- Eat B12-rich foods: Eggs, dairy, fish, and fortified cereals.
- Folate sources: Leafy greens, citrus fruits, and beans.
- Supplements: If deficiency is confirmed.
When to See a Doctor
If you experience persistent fatigue, weakness, or unusual symptoms, consult a doctor. A simple CBC test can check your MCH levels. If needed, your doctor may suggest:
- Iron studies (for low MCH)
- Vitamin B12 and folate tests (for high MCH)
- Further evaluation for underlying conditions
- You can easily book a blood test or consult a doctor through Apollo 24|7 for a quick check-up.
Final Thoughts
MCH is a small but important part of your blood test that helps detect anaemia or vitamin deficiencies. If your levels are off, don’t panic—many causes are treatable with diet or supplements. Always follow your doctor’s advice for the best care.
Consult a Top General physician
Consult a Top General physician
Dr. Lakshmi Sanjitha Kakani
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Dr. Anshul Maheshwari
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Dr. Dhankecha Mayank
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Gujarat
Apollo 24|7 Virtual Clinic - Gujarat, Gujarat
Consult a Top General physician
Dr. Lakshmi Sanjitha Kakani
General Physician/ Internal Medicine Specialist
6 Years • MBBS, MD (General Medicine)
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr. Shesham Srinidhi
General Practitioner
5 Years • MD(physician)
Hyderabad
Apollo 24|7 Clinic, Hyderabad
(125+ Patients)
Dr. Anshul Maheshwari
General Practitioner
5 Years • MBBS
Lucknow
Apollo 24|7 Clinic - Uttar Pradesh, Lucknow
Dr. Mohammed Huzef Ul Arifeen
General Practitioner
3 Years • MBBS
Hyderabad
Apollo 24|7 Clinic - Telangana, Hyderabad
Dr. Dhankecha Mayank
General Practitioner
6 Years • MBBS
Gujarat
Apollo 24|7 Virtual Clinic - Gujarat, Gujarat
