ANAEMIA FROM VITAMIN B12 OR FOLATE DEFICIENCY
Megaloblastic Anaemia
A form of anaemia caused by vitamin B12 or folate deficiency, producing large abnormal red blood cells, fatigue, neurological symptoms and pallor. Treatable with targeted vitamin supplementation.
ABOUT THIS CONDITION
What is Megaloblastic Anaemia
Megaloblastic anaemia is a type of anaemia in which red blood cells are abnormally large (macrocytic) due to deficiency of vitamin B12 or folate. These vitamins are essential for DNA synthesis, and their deficiency disrupts the normal production of red blood cells. Common causes of vitamin B12 deficiency include inadequate dietary intake (particularly in strict vegetarians and vegans), pernicious anaemia (autoimmune destruction of stomach cells producing intrinsic factor), gut surgery or inflammatory bowel disease, certain medications and ageing. Folate deficiency is most often due to poor diet, pregnancy, alcohol use, gut disorders and certain medications. Typical features include tiredness, weakness, pallor, breathlessness, sore tongue, mild jaundice and, in vitamin B12 deficiency, neurological symptoms including tingling, numbness, balance problems and memory difficulties. Diagnosis involves blood tests and identification of the underlying cause. Treatment includes targeted vitamin supplementation and addressing the cause. Dr. Patnam Pravallika Reddy provides comprehensive evaluation and care at Lux Hospitals, Hyderabad.
SIGNS TO WATCH
Common Symptoms
Symptoms that need attention
WHY IT HAPPENS
Causes & Risk Factors
- Inadequate dietary vitamin B12 in strict vegetarians and vegans
- Pernicious anaemia (autoimmune cause)
- Gut surgery or inflammatory bowel disease
- Poor dietary folate intake
- Pregnancy and increased folate needs
- Alcohol use disorder
- Certain medications that affect vitamin absorption or metabolism
CLINICAL DETAILS
KeyFacts
Complete blood count, vitamin B12 and folate levels, blood film and tests for the underlying cause
B12 deficiency · Folate deficiency · Combined deficiency
Vitamin B12 or folate supplementation depending on the deficiency
B12 deficiency can cause neurological symptoms even before anaemia
Folate alone in B12 deficiency can worsen neurological symptoms — both must be measured
Available at Lux Hospitals, Hyderabad
HOW WE TREAT IT
Treatment Approach
Targeted Vitamin Supplementation with Cause Workup
The most effective approach is identifying whether vitamin B12 or folate (or both) is deficient through blood tests, followed by targeted supplementation — usually oral or injection — and addressing the underlying cause to prevent recurrence.
- 1
Consultation & Assessment
Dr. Pravallika reviews diet, symptoms and risk factors, examines the patient and arranges blood tests including vitamin B12 and folate levels.
- 2
Treatment Planning
A personalised plan is created based on the identified deficiency and underlying cause.
- 3
Medical Management
Vitamin B12 or folate supplementation (oral or injection), dietary advice and treatment of underlying causes.
- 4
Recovery & Follow-up
Regular follow-up with blood tests to monitor response and ongoing therapy as needed.
AVAILABLE TREATMENTS
Treatment Options
Vitamin B12 Supplementation
Vitamin B12 is given either orally or by injection, depending on the cause and severity. Patients with pernicious anaemia or absorption issues typically need long-term injections.
Folate Supplementation
Folate supplementation, usually oral, corrects folate deficiency and is essential during pregnancy.
Combined Therapy When Both Are Deficient
Both deficiencies are treated together — never folate alone in B12 deficiency, as that can worsen neurological symptoms.
Dietary Advice
Guidance on B12-rich foods (dairy, eggs, fortified foods for vegetarians; meat, fish for non-vegetarians) and folate-rich foods (green leafy vegetables, pulses, fortified grains).
Treatment of Underlying Cause
Specific treatment is provided for pernicious anaemia, gut disorders, alcohol use disorder and other identified causes.
COMMON QUESTIONS
Frequently Asked Questions
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