Health Benefits of Bananas

My mother, who lives in India, had severe Celiac disease for three years. Lost her health and looked very weak. Nothing worked for her. One day she took juice and pulp of inside of a banana tree (i.e soft white part of stem) a cup for 3-4 times a day and next day blood in poop and pee totally stopped. We eat and cook stem of banana tree as vegetable, it's very common there. Since she suffered so long with this terrible disease, now she has burning / sensitive tongue and mouth. Which I believe is Vitamin B12 deficiency. So she just started taking Vitamin B complex tablet. At her place she could not find to buy only B12 tablets.