Vitamin B12 Tablet – What’s the Dose and How Many Days to Take?

Dr. Karuturi Subrahmanyam
Apr 23
2 min read

Updated: Apr 25

Introduction

Vitamin B12 is an essential nutrient that helps maintain healthy nerve cells, supports red blood cell production, and is crucial for brain function and DNA synthesis. A deficiency can cause fatigue, numbness, poor memory, and even anemia. In such cases, your doctor might recommend Vitamin B12 tablets to restore normal levels.

When Are Vitamin B12 Tablets Needed?

B12 supplements may be advised if you have:

Low B12 levels confirmed by blood tests
Fatigue or weakness due to anemia
Tingling or numbness in hands/feet
Poor diet (e.g., vegan or vegetarian without B12-rich foods)
Malabsorption conditions (e.g., gastritis, celiac disease, Crohn’s disease)
Post weight-loss surgery or long-term acid-reducing medications

Recommended Dose

The dose of B12 tablets varies based on the severity of the deficiency and the cause:

Mild deficiency: 500 mcg to 1000 mcg once daily
Moderate to severe deficiency: 1000 mcg daily for 1–2 months, then maintenance dose
Maintenance (after levels normalize): 500 mcg to 1000 mcg, 2–3 times per week or as prescribed

Note: Always follow your doctor’s advice regarding the exact dose.

Duration of Treatment

Short-term deficiency: Tablets may be taken daily for 1–3 months until levels improve.
Long-term or recurrent deficiency: Lifelong supplementation may be necessary, especially in people with absorption issues or on a strict vegetarian diet.
Follow-up: A repeat blood test is usually done after 2–3 months to check response.

Tips While Taking B12 Tablets

Can be taken with or without food
If you miss a dose, take it as soon as you remember
Store in a cool, dry place
Inform your doctor if you take other medicines or have any chronic condition

Summary

Vitamin B12 tablets are safe and effective when taken at the right dose and duration as advised by a doctor. Don’t self-medicate – proper testing and guidance are important. Regular monitoring helps ensure you get the best results and avoid long-term complications.

If you have any symptoms of B12 deficiency, consult your doctor for testing and tailored treatment.

Dr. Karuturi Subrahmanyam, MD, FRCP (London), FACP (USA)

Internal Medicine Specialist

Kify Hospital

Danavaipeta

Rajahmundry

Phone : 85000 23456