The cause of her deficiency symptoms of vitamin B-12 may be as a result of the body having problems absorbing the nutrient.
What is Deficiency?
This is defined as the shortage of something as a result of various factors such as reduced absorption etc.
Pernicious anaemia causes reduced absorption of vitamin B-12 as a result of the stomach producing intrinsic factors which is why the deficiency symptoms may be seen.
Read more about Pernicious anaemia here https://brainly.com/question/26411686
