side effects of vitamin b12 injections What Does a Shot Do for You? B12 Deficiency Understanding the B12 Vitamin Shot:

MIC injections commonly contain lipotropic compounds such as methionine, inositol, and choline, which support the bodys natural fat metabolism and metabolic processes

And like another user said, I found if you injected slowly that it hurt less

Consult with a pharmacist or doctor if side effects persist or worsen

Put plainly, the off period is not there because the compound stops working it is there because no one can point to human data showing that running it indefinitely is safe, and a scheduled break is the honest way to respect that gap

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That said, unless your doctor says otherwise, there is usually no harm in taking a daily supplement