Mean Corpuscular Haemoglobin Concentration (MCHC) is a way to measure the average concentration of haemoglobin within the red blood cells. While the normal range of MCHC is between 32 and 36 grams per decilitre, or 320 to 360 grams per litre, values below this range can indicate low MCHC, and this condition is known as hypochromia. This article is about the condition, causes, risk factors, symptoms and more.

Causes of Low MCHC

The causes of MCHC includes:

Iron Deficiency Anaemia: The most common cause of low MCHC. Insufficient iron leads to decreased haemoglobin production.
Thalassemia: An inherited blood disorder that affects haemoglobin production.
Chronic Diseases: Conditions like rheumatoid arthritis, kidney disease, or cancer can interfere with red blood cell production.
Lead Poisoning: Excessive lead exposure can impair haemoglobin synthesis.
Vitamin B6 Deficiency: This vitamin is essential for haemoglobin formation.
Sideroblastic Anaemia: A rare condition where the body can't properly use iron to make haemoglobin.

Symptoms of Low MCHC

While low MCHC itself doesn't cause symptoms, the underlying conditions often lead to:

Fatigue and weakness
Pale skin
Shortness of breath, especially during physical activities
Dizziness or light-headedness
Cold hands and feet
Chest pain or irregular heartbeats (in severe cases)
Cognitive issues like poor concentration or memory problems

Complications of Low MCHC

While low MCHC itself is not a disease but rather an indicator of an underlying condition, the associated health issues can lead to various complications if left untreated. It's important to note that these complications are typically related to the underlying cause of low MCHC, most commonly anaemia. Here are some potential complications:

Cardiovascular Problems:

Tachycardia (rapid heart rate): The heart may beat faster to compensate for the reduced oxygen-carrying capacity of the blood.
Heart failure: In severe or chronic cases, the heart may become weakened from overwork.
Enlarged heart: The heart may enlarge as it tries to pump more blood to meet the body's oxygen needs.

Pregnancy Complications:

Premature birth
Low birth weight babies
Increased risk of maternal mortality

Growth and Development Issues:

In children, chronic low MCHC due to iron deficiency can lead to delayed growth and development.
Cognitive impairments and learning difficulties may occur in severe cases.

Decreased Immune Function:

Increased susceptibility to infections due to compromised immune system function.

Fatigue and Decreased Quality of Life:

Chronic fatigue can significantly impact daily activities and overall quality of life.
Reduced work productivity and decreased exercise tolerance.

Psychological Effects:

Mood changes, irritability, and depression can occur, especially in chronic cases.
Cognitive issues like difficulty concentrating or memory problems.

Pica:

In some cases of severe iron deficiency, individuals may develop pica, a disorder characterised by cravings for non-food items like ice, dirt, or clay.

Restless Leg Syndrome:

Some studies have linked iron deficiency with restless leg syndrome, causing discomfort and sleep disturbances.

Osteoporosis:

In cases where low MCHC is due to chronic conditions affecting bone marrow, there may be an increased risk of osteoporosis.

Increased Falls Risk in Elderly:

Elderly individuals with chronic anaemia may have an increased risk of falling due to dizziness and weakness.

Complications from Underlying Conditions:

If low MCHC is due to chronic diseases like kidney failure or cancer, complications related to these conditions may worsen.

Transfusion-Related Complications:

In severe cases requiring frequent blood transfusions, there's a risk of iron overload and related complications.

Diagnosis of Low MCHC

Low MCHC is typically discovered through a Complete Blood Count (CBC) test. This test provides information about the number, size, and shape of blood cells, as well as haemoglobin concentration. If low MCHC is detected, additional tests may be ordered to determine the underlying cause:

Serum iron and ferritin levels to check for iron deficiency
Haemoglobin electrophoresis to diagnose thalassemia
Blood lead levels if lead poisoning is suspected
Vitamin B6 levels
Tests for chronic diseases, depending on other symptoms

Treatment Options for Low MCHC

Treatment for low MCHC focuses on addressing the underlying cause:

Iron Supplementation: For iron deficiency anaemia, oral or intravenous iron supplements may be prescribed.
Dietary Changes: Increasing intake of iron-rich foods like lean meats, leafy greens, and fortified cereals.
Vitamin B6 Supplementation: If a deficiency is detected.
Chelation Therapy: For cases of lead poisoning to remove excess lead from the body.
Management of Chronic Diseases: Treating the underlying condition can help improve MCHC levels.
Blood Transfusions: In severe cases of anaemia, especially if symptoms are life-threatening.
Medications: Specific treatments may be necessary for conditions like thalassemia or sideroblastic anaemia.

Prevention and Management

While not all causes of low MCHC are preventable, some steps can help maintain healthy MCHC levels:

Eat a balanced diet rich in iron, vitamins, and minerals
Consider iron supplements if at risk of deficiency (consult doctor first)
Attend regular health check-ups to catch and address issues early
Manage chronic conditions effectively
Avoid exposure to lead and other toxic substances

Low MCHC is an important indicator of potential health issues, particularly related to red blood cell and haemoglobin production. While it's not a diagnosis, it serves as a valuable clue for healthcare providers to investigate further. If one has been diagnosed with low MCHC, working closely with healthcare teams to identify and treat the underlying cause is recommended. With proper management, most conditions leading to low MCHC can be effectively treated, improving overall health and quality of life.

Frequently Asked Questions About Low MCHC

Q. How is MCHC measured?
A. MCHC is measured as part of a Complete Blood Count (CBC) test, which analyses various components of the blood, including red blood cells, white blood cells, and platelets.

Q. Can low MCHC levels affect children differently than adults?
A. Yes, children with low MCHC may experience delayed growth and development, learning difficulties, and increased susceptibility to infections, in addition to common anaemia symptoms.

Q. What dietary changes can help increase MCHC levels?
A. Consuming iron-rich foods (like red meat, leafy green vegetables, and legumes), vitamin C (which helps with iron absorption), and foods fortified with iron can help improve MCHC levels.

Q. Can low MCHC levels be a sign of a more serious condition?
A. Yes, low MCHC levels can sometimes indicate underlying serious conditions such as chronic kidney disease, certain cancers, or inherited blood disorders like thalassemia or sickle cell anaemia.

Q. How often should someone with low MCHC levels get their blood tested?
A. The frequency of testing should be determined by a healthcare provider based on the severity of the anaemia, the underlying cause, and the individual's response to treatment. Regular monitoring may be necessary to ensure effective management.

Reference links:

https://www.healthline.com/health/low-mchc
https://www.medicinenet.com/what_does_a_low_or_high_mchc_mean_in_a_blood_test/article.htm
https://www.health.com/mchc-blood-test-7092747