An extrinsic factor must be provided by the diet to prevent pernicious anemia.

Question

Quizplus · Accepted Answer

Pernicious anemia is caused by the inability of the body to absorb vitamin B12 from food. Vitamin B12 is an intrinsic factor, meaning it is produced by the body. However, an extrinsic factor (i.e. external source) of vitamin B12 must be provided by the diet to prevent pernicious anemia. This is typically achieved through the consumption of animal products such as meat, fish, and dairy, which are rich sources of vitamin B12.

An Extrinsic Factor Must Be Provided by the Diet to Prevent