Vitamin B12 is an essential nutrient that plays an important role in several functions throughout the body. It helps support normal red blood cell formation, contributes to healthy nerve function, and is involved in DNA production.
Because the body does not make vitamin B12 naturally, it must be obtained through food or supplements. The vitamin is naturally present in foods such as meat, fish, eggs, and dairy products. Some fortified plant-based foods and supplements can also provide B12.
People who follow vegetarian or vegan diets may have a higher risk of vitamin B12 deficiency if they do not regularly consume fortified foods or use an appropriate supplement. Older adults and people with certain digestive conditions or absorption problems may also be at increased risk.
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