common side effects of b12 injections Are There Any from Injections? Why Do I Feel Worse
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![PDF] Sublingual vitamin B12 compared to intramuscular injection in patients with type 2 diabetes treated with metformin: a randomised trial](https://figures.semanticscholar.org/09492d7c4a2f76a1fddc09d55b909d3b4f259caf/6-Table2-1.png)






