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FAQs What is vitamin B12 injections used for

This makes it potentially suitable for individuals with insulin resistance, pre-diabetes, or type 2 diabetes, populations who would not be good candidates for growth hormone therapy due to its glucose-elevating effects

Unless the argument is that those people can access their B12 stores and you cannot, but I don't think we can assume that
If a larger amount has been applied Poisoning or overdose symptoms are not known
