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Vitamin B12 / Mecobalamin / Cynocobalamin / Methylcobalamin

Description

Vitamin B12, or methylcobalamin, is an essential water-soluble vitamin vital fo

r various bodily functions. Unlike other B vitamins, the body can store B12 for several years, mainly in the liver. A deficiency in B12 can cause significant health issues. The most well-known is megaloblastic anaemia, a condition in which red blood cells become abnormally large and cannot mature properly, thereby impairing their ability to carry oxygen. This can result in fatigue, weakness, and shortness of breath. Furthermore, B12 is vital for maintaining a healthy nervous system. A lack of it can cause neurological damage, leading to symptoms such as numbness, tingling in the hands and feet, difficulty with balance, and cognitive issues like memory loss. Since B12 is mainly found in animal products, individuals following vegan or vegetarian diets are at higher risk of deficiency and often need to supplement.

uses

Uses

  • Vitamin B12, or methylcobalamin, is used for the treatment and prevention of Vitamin B12 deficiency anaemia.
  • For preventing Vitamin B12 deficiency during pregnancy, breastfeeding, after surgery or in conditions of nutritional malabsorption.
  • It is also used in the treatment of a condition of nerve damage also known as diabetic neuropathy.
precautionsAndWarnings

Precautions and Warnings

otherGeneralWarnings

Other General Warnings

Talk to your doctor if
  • You have any existing medical condition and you are on other medications, supplements or following any complementary or integrative health approaches.
  • You should not take this vitamin if you are allergic to it.
  • You have any planned surgery or operation. You may be asked to stop taking these products at least 2-3 weeks ahead of the procedure.
  • Dietary supplements containing vitamin B12 are intended to supplement the diets of some people and should not be a substitute for a well-balanced, varied diet and a healthy lifestyle.
modeOfAction

Mode of Action

How Does It Work?

  • Methylcobalamin is a form of Vitamin B12 also known as mecobalamain.
  • It is essential for the functioning of the brain and nerves, for the production of red blood cells and DNA synthesis.
  • It also plays a major role in protein and fat metabolism, fertility and functioning of various hormones.
  • Deficiency of vitamin B12 can lead to anaemia and neurological changes.
  • Methylcobalamin is widely prescribed along with other medicines for the treatment and prevention of diabetic neuropathy. It supports nerve regeneration and has neuroprotective properties.

Content Details

WRITTEN BY
doctor

Dr. Arpit Verma

MBBS, MD, CCEBDM Diabetology

REVIEWED BY
doctor

Dr. Ritu Budania

MBBS, MD (Pharmacology)

Frequently Asked Questions (FAQs)

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Q: What are the food rich in methylcobalamin?

A: Fish, meat, poultry, eggs, milk, and milk products are rich in vitamin B12.

Q: Does methylcobalamin interact with other medicines?

  • Medicines treat indigestion like antacids, medicines used to treat bacterial infections like Chloramphenicol and medicines used to treat bone problems like bisphosphonates should be taken with a minim...
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  • Consult your doctor if you are taking medicines like Phenytoin (used to treat epilepsy), Methotrexate (used to treat cancer), Sulfasalazine (used to treat ulcers), water pill, metformin, Omeprazole an...
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Q: What happens due to vitamin B12 deficiency?

A: Deficiency of Vitamin B12 can lead to anaemia characterized by fatigue, weakness, constipation, loss of appetite, weight loss and neurological changes such as numbness and tingling in the hands and feet. Additionally, it can lead to difficulty in maintaining balance, feeling low, confusion, dementia, poor memory, and soreness of the mouth or tongue.

Q: What is Vitamin B12 / Mecobalamin / Cynocobalamin / Methylcobalamin and why is it important?

A: Vitamin B12 is an essential nutrient your body needs to produce healthy red blood cells and keep your nerves and brain functioning properly. The different names Mecobalamin, Cyanocobalamin, and Methylcobalamin, refer to various forms of the same vitamin. They all support your energy levels and maintain a healthy nervous system.

Q: What are the different forms of Vitamin B12 and how are they different?

A: There are three main types: Cyanocobalamin is a synthetic, man-made form commonly found in supplements and fortified foods. Methylcobalamin and Mecobalamin are active forms of B12 that the body can use directly. Mecobalamin and Methylcobalamin are the same thing and are often used for neurological health. Your doctor can help you determine which form is best suited to your specific needs.

Q: How do I know if I'm deficient in Vitamin B12?

A: Symptoms of a deficiency can be vague and include fatigue, weakness, a tingling sensation or numbness in your hands and feet, and memory problems. The most accurate way to check your B12 levels is with a blood test ordered by your doctor.

Q: Can Vitamin B12 / Mecobalamin / Cynocobalamin / Methylcobalamin be taken with other medications?

A: Yes, some medications can affect how your body absorbs Vitamin B12. Common examples include certain drugs for heartburn (proton pump inhibitors), diabetes (metformin), and gout. It's very important to tell your doctor or pharmacist about all the medicines and supplements you are taking.

Q: Are there any side effects of taking Vitamin B12?

A: Vitamin B12 is generally very safe, and side effects are rare. Some people may experience mild side effects like nausea, upset stomach, or, with injections, pain or redness at the injection site. Serious allergic reactions are extremely uncommon.

Q: Is Vitamin B12 safe during pregnancy or while breastfeeding?

A: Yes, it is very important to have enough Vitamin B12 during pregnancy and breastfeeding for the healthy development of the baby’s brain and nervous system. However, you should always talk to your doctor before starting any new supplement while pregnant or breastfeeding.

Q: Who is at risk for a deficiency?

A: People who follow a vegan or vegetarian diet, older adults, people with digestive disorders like Crohn's disease, and those who have had stomach surgery are at higher risk.

Q: How long do I need to take Vitamin B12 supplements?

A: The length of time you need to take B12 depends on what caused your deficiency. Some people may only need short-term treatment, while others with chronic conditions may need to take it for life. Your doctor will monitor your B12 levels and guide your treatment plan.

Q: How long does it take to see the benefits of taking Vitamin B12?

A: Many people begin to feel better, with improved energy and reduced symptoms, within a few weeks of starting treatment, especially if they are getting injections. For others, it may take a few months to fully feel the effects.
Last Updated on: 17 Sep 2025 | 02:19 PM (IST)

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The information provided herein is supplied to the best of our abilities to make it accurate and reliable as it is published after a review by a team of professionals. This information is solely intended to provide a general overview on the product and must be used for informational purposes only. You should not use the information provided herein to diagnose, prevent, or cure a health problem. Nothing contained on this page is intended to create a doctor-patient relationship, replace or be a substitute for a registered medical practitioner's medical treatment/advice or consultation. The absence of any information or warning to any medicine shall not be considered and assumed as an implied assurance. We highly recommend that you consult your registered medical practitioner for all queries or doubts related to your medical condition. You hereby agree that you shall not make any health or medical-related decision based in whole or in part on anything contained in the Site. Please click here  for detailed T&C.
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