Final answer:
Pernicious anemia results from vitamin B12 deficiency. Factors that can interfere with its absorption include intestinal disorders like Crohn's disease, surgical removal of parts of intestines or stomach, and lifestyle choices such as vegan or vegetarian diets.
Step-by-step explanation:
Pernicious anemia is a result of vitamin B12 deficiency. This condition can occur due to a problem with the absorption of this vitamin in the body. There are several factors that may interfere with the proper absorption of vitamin B12, leading to this anemia.
Two factors that may interfere with the absorption of this vitamin are Crohn's disease and surgical removal of the intestines or stomach. In patients with Crohn's disease, the severe intestinal disorder affects the absorption of nutrients, including vitamin B12. Surgical removal of the intestines or stomach can also lead to poor absorption of vitamin B12.
Firstly, certain intestinal disorders, such as Crohn's disease, can lead to poor absorption of this vitamin. Individuals who have undergone surgery which involves removal of parts of intestines or stomach might also face issues with vitamin B12 absorption.
Secondly, specific lifestyle choices could also contribute. Those who follow vegan or vegetarian diets are more prone to vitamin B12 deficiency as this vitamin is primarily found in animal products. Thus, the absence of animal products in their diet may cause lack of sufficient vitamin B12.
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