Reduced secretion of intrinsic factor is a normal physiological change that is associated with aging.
The intrinsic factor is a substance that is usually found in the stomach of a person. In order to digest vitamin B12, a person would need this.
As a person gets advanced in age, they begin to have issues that have to do with the digestion of B12.
The reason why this happens is because as a person gets older they have issues with the acids and the enzymes that aids in the absorption of certain vitamins.
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