Folate Deficiency

Overview

Folate (vitamin B9) is needed for red blood cell production and for healthy cell division. Deficiency causes a macrocytic anaemia — large red cells and low haemoglobin — that looks similar to B12 deficiency on a blood count, which is why the two are always checked together. Folate is especially important in early pregnancy, when it reduces the risk of certain birth defects. This page focuses on folate deficiency; the red-cell pattern is covered on the Macrocytic Anaemia page.

Common causes

• Poor dietary intake — folate is found in leafy green vegetables, lentils, beans and citrus; deficiency can develop quickly as stores are small.
• Pregnancy and breastfeeding, when demand rises.
• Malabsorption — coeliac disease, gut surgery, inflammatory bowel disease.
• Excess alcohol.
• Certain medicines — some anticonvulsants and other long-term drugs.

Symptoms

Folate deficiency causes the general symptoms of anaemia — tiredness, breathlessness, palpitations and paleness — and may cause a sore tongue, reduced appetite and irritability. Unlike B12 deficiency, it does not typically cause nerve symptoms, which is one reason the two are distinguished. See Macrocytic Anaemia and Fatigue Due to Anaemia.

Evaluation and investigations

Diagnosis is made from a serum or red-cell folate level, alongside a complete blood count showing large red cells (high MCV) and a peripheral smear. B12 is always checked at the same time, because correcting folate alone in the presence of B12 deficiency can worsen nerve damage. The cause is sought from diet, alcohol, medicines and gut health. See Vitamin B12 Deficiency and Abnormal Test Results.

Management overview

Treatment is with folate tablets, usually daily, alongside dietary improvement. In pregnancy, folic acid is started before conception and continued through the first trimester. B12 is corrected first or together if both are low. The response is confirmed with repeat blood counts. See Macrocytic Anaemia and Nutritional Anaemia.

Warning signs — seek prompt care

• Anaemia with nerve symptoms (tingling, numbness) — B12 deficiency must be excluded before folate alone is given.
• Severe anaemia with breathlessness or fainting.

How we help

Dr. Nayak confirms folate deficiency, checks B12 at the same time, and builds a replacement and dietary plan — with pregnancy-specific guidance where relevant. Consultations are available in-clinic in Bhubaneswar and over teleconsultation.

Related conditions and patient concerns

• Vitamin B12 Deficiency
• Macrocytic Anaemia
• Nutritional Anaemia
• Anaemia
• Digestive Problems
• Preventive Health & Health Check-ups