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What is vitamin B12 and why is it so important?
Question Date: 2015-05-09
Answer 1:

Vitamin B12 (also known as cobalamin) is a large and complex molecule that has a tetrapyrrole ring that binds to cobalt, an essential human micronutrient. We do not produce Vitamin B12, it is produced by certain microrganisms. We therefore depend on microbes for our daily cobalamin supply; we get 5-30 micrograms from the food we eat, and a small amount is produced by the microbes that live in our intestines. A normal human has 2-5 mg of Vitamin B12 in the body, most of it is in the liver and kidneys. The amount of cobalamin required to maintain normal levels is 2-5 micrograms per day and if we do not get vitamin B12, deficiency symptoms will develop after several years. Cobalamin deficiency leads to neurological abnormalities and anemia. Therefore, vitamin B12 appears to be important for brain function and blood production. Researchers are still investigating exactly how vitamin B12 works at the cellular level.

I hope that helps.

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