Vitamin B12 is a nutrient that helps keep healthy neurons and blood cells, this vitamin prevents a type of anemia, called megaloblastic anemia, which causes fatigue in people.
Vitamin B12 combines with a protein produced by the stomach called “intrinsic factor” that helps the vitamin to be absorbed
Vitamin B12 is naturally present in a wide variety of foods of animal origin and in certain foods fortified with added vitamin B12.
- Bovine liver and clams, which are the best sources of vitamin B12.
- Fish, meat, poultry, eggs, milk and other dairy products, which also contain vitamin B12.
In the United States, enough vitamin B12 is obtained from food. However, some people have difficulty absorbing it from food. As a result there are people who are deficient in vitamin B12
It is possible that certain groups of individuals do not consume enough vitamin B-12, such as the following:
- Older adults,
- People over 50 should consume the majority of vitamin B12 from fortified foods or dietary supplements.
- People who have pernicious anemia, whose body does not produce the intrinsic factor.
- People who have had gastrointestinal surgery
- Those who eat little or no food of animal origin, such as vegetarians and strict vegetarians. Vitamin B12 deficiency causes tiredness, weakness, constipation, loss of appetite, weight loss and megaloblastic anemia.