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Vitamin B12: Sources, benefits & deficiency

Vitamin B12 is one of eight B vitamins needed for a range of important physiological functions. It’s found naturally in animal products and fortified foods, or can be taken via supplement form or administered via injection. 

“Vitamin B12 is crucial to the human body, which needs it to produce new DNA, red blood cells, proteins, hormones and fats,” explains Heather Mangieri, a registered dietitian nutritionist. “Vitamin B12 is also key to the health of nerves. It’s part of the vitamin B complex, which includes thiamin, niacin, vitamin B6 and folate. Each of these vitamins has its own unique role in the body, but most B vitamins have a role in helping your body’s cells produce energy.”

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