how does b12 injection make you feel Are Shots Safe? Royal Palm Beach Medical Group Feeling worse after B12 Injection:
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Blood 137:11541165 Richardson PG, Beksa M, pika I, Mikhael J (2020) Isatuximab for the treatment of relapsed/refractory multiple myeloma

A typical injection contains hydroxocobalamin or methylcobalamin, two bioavailable forms of vitamin B12 that are easily utilised by the body
B12 is naturally available only in animal proteins, so people who eat vegetarian or vegan diets may not consume enough B12
