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doi: 10.1053/j.gastro.2016.10.020
Moreover, individuals who are malnourished, have cancer, are elderly, pregnant, or are alcoholics are also at higher risk in suffering the lack of vitamin B12

B12 injections are a form of supplementation that allows a doctor to inject a synthetic version of vitamin B12, or cyanocobalamin, directly into your muscles

Injection site reactions typically resolve within 24-48 hours

Pancreatic Insufficiency: The pancreas helps with B12 absorption, and not enough of it can cause deficiency

What it does to visceral fat, IGF-1, and who should avoid it.
