vitamin b12 injections subcutaneous or intramuscular Compounded Cyanocobalamin (Vitamin B12) Injection B12 Shots vs. IV Infusions:
Description
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Effect size and physiological context

Older adults are also at a higher risk of B12 deficiency due to decreased stomach acid levels, which are needed to separate B12 from protein in the diet for absorption

Too soon to say much, however my appetite is decreasing
