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I'd much rather have my injection in the top of my arm than my bottom, I'd find that more painful

What is a B12 Injection

Some people experience no pain relief from ESIs

[DOI] [PubMed] [Google Scholar] 44.Duan J, Shen DD, Zhou XE, Bi P, Liu QF, Tan YX, et al

J Funct Foods

Other Substances That Can Cause Heart Palpitations While certain vitamins and minerals can cause heart palpitations, it's much more likely that something else is causing this issue
