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b12 injection gauge needle A Guide to the Best Needles for Injections what gauge needle to use
Description
Ma J, et al
doi:10.1152/ajpendo.00558.2014

If yes, no specific follow up for B 12 is required

Get bloodwork including B12, iron, vitamin D, and a comprehensive metabolic panel every 8 to 12 weeks while on treatment

I've guided hundreds of patients through this process, and with the right technique, it can be quick and nearly painless