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feeling worse after b12 injection Why Do I Feel My Injection? Understanding Post-Injecti – Oxford Origins Why Do I Feel Worse
Description
B12 is a water-soluble vitamin, meaning your body will naturally excrete any excess

You'll be fine

B12 vitamin shots begin working right away and your body will begin to manufacture new red blood cells as early as 48 hours

[DOI] [PubMed] [Google Scholar] 127.Kominiarek M.A