People who undergo bariatric gastric bypass surgery have high risk of B12 deficiency because normally
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a
vitamin B12 is absorbed from the stomach
b
vitamin B12 is synthesised in the stomach
c
stomach secretes a substance that helps in absorption of vitamin B12
d
vitamin B12 functions optimally in acidic pH
answer is C.
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Detailed Solution
Parietal or oxyntic cells of gastric glands secrete intrinsic factor essential for absorption of vitamin B12. So, the people who have undergone bariatric gastric bypass surgery have high risk of vitamin B12 deficiency.