Cobalamin, or vitamin B12, is a vitamin that dissolves in water and is essential for metabolism. It’s one of eight different B vitamins. It is offered as a dietary supplement and a prescription drug and is naturally found in some foods and added to others.

The body needs vitamin B12 for several biological functions to occur, as follows:

• The functioning of the brain and nerves.
• In the bone marrow, for the red blood cell formation and maturation.
• Creation of DNA molecules, which carry genetic information inside cells.
• Amino acid and fatty acid metabolism.

Doctors prescribe vitamin b12 for the following health conditions

• Vitamin B12 deficiency
• Imerslund-Grasbeck disease
• Cyanide poisoning
• Canker sores
• Hyperhomocysteinemia
• Post-herpetic neuralgia

It may occasionally have a few side effects, such as:

• Headache.
• Diarrhea.
• Nausea.
• Vomiting.
• Weakness.
• Fatigue.
• Dizziness.
• Hot flashes.