how many ml is a b12 injection Compounded Methylcobalamin (Vitamin B12) Injection, 5mg/mL B12 Injection Dosage and Frequency:

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Indiscriminate administration of vitamin B12 may mask the true diagnosis of pernicious anemia

Do not inject into a painful or inflamed area

Vitamin B12 deficiency is common

Deficiency is particularly common in elderly people, because the ability to absorb vitamin B12 can decrease with age ( Other people at risk of deficiency include those who have had intestinal surgery, including weight loss surgery

Understanding the fundamental role of Intrinsic Factor and Transcobalamin II in B12 abortion, utilisation and recycling required for effective mitochondrial delivery is also vital