this occurs because there is not enough vitamin B12 in the diet, or poor absorption Pernicious anemiaa type of megaloblastic anemia caused by a lack of intrinsic factor, so that vitamin B12 is not absorbed Fatigue, weakness Nerve damage with numbness, tingling in the hands and legs Memory loss, confusion Dementia Depression Seizures Up to 15% of the general population has a B12 deficiency
A deficiency can lead to fatigue, weakness, and sluggishness
But this does not mean that all the B12 contained in the tablet will be absorbed, as it also depends on how much intrinsic factor is available for its absorption
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However, your body cannot produce vitamin B12 on its own