Vitamins are micronutrients that are necessary for the proper development and functioning of the body. Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. Vitamin B12 plays an essential role in red blood cell formation, cell metabolism, nerve function, and the production of DNA.
People who have undergone bariatric surgery may be at greatest risk of B12 deficiency. Other high-risk groups include those with anemia, people who restrict animal products(vegetarians, vegans, etc.), anyone who takes the diabetes drug Metformin, and elderly people.