can b12 injection be given in arm Dosage and Frequency: 7 Guidelines for Adults Vitamin B12 Injections in Murrells
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Post-injection skin inflammation and infections may occur due to unsanitary administration or a reaction to the medicine

Think of them as a helpful boost alongside smart nutrition and regular movement

Its important to remember that while B12 injections can address fatigue related to deficiency, they are not a universal solution for tiredness caused by other medical or lifestyle factors

Discovery of vitamin B12 in the liver and its absorption factor in the stomach: A historical review

I know you didn't mention that as an issue, but I feel there is some link between B12, cystic acne, mast cell dysfunction, gastroparesis and probably many other symptoms