When you hear B12 shot, you might picture a single, standard procedure
The reasons: Low lower limit : In most countries, the lower end of the standard vitamin B12 range (100-250 pg/mL) is too low, often missing severe deficiencies
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The main causes of a vitamin B12 deficiency are as follows: Malabsorption due to poor intestinal health (inflammation, bacteria, fungal infection, parasites, disturbed intestinal flora) due to a lack of transport molecules (intrinsic factor), genetic diseases (cobalamin disease) or medications that hinder uptake