What is vitamin b12 deficiency?

Vitamin B12 deficiency can happen if you have certain conditions, such as: Atrophic gastritis, in which your stomach lining has thinned. Pernicious anemia, which makes it hard for your body to absorb vitamin B12. Surgery that removed part of your stomach or small intestine, including weight loss surgery.Jul 23, 2015 read more

You can also get vitamin B12 deficiency if you follow a vegan diet (meaning you don't eat any animal products, including meat, milk, cheese, and eggs) or you are a vegetarian who doesn't eat enough eggs or dairy products to meet your vitamin B12 needs. read more

Vitamin B 12 deficiency, also known as cobalamin deficiency, is the medical condition of low blood levels of vitamin B 12. In mild deficiency a person may feel tired and have a reduced number of red blood cells (anemia). read more

Vitamin B12 deficiency can develop for the following reasons: Absence of intrinsic factor, also called pernicious anemia — Intrinsic factor is a protein secreted by cells of the stomach lining. Intrinsic factor attaches to vitamin B12 and takes it to the intestines to be absorbed. read more