b12 injections a fad Why Shots Are Popular And How They Boost Your Health How to Give B12 Injections
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[DOI] [PMC free article] [PubMed] [Google Scholar] 88.Gorman, G

Tell your provider right away if you have pain in your upper stomach, yellowing of skin or eyes (jaundice), fever, or clay-colored stools
One is what is in the injection, as some agents may work better for some patients than others

The choice between these approaches may depend on individual GI sensitivity and weight loss goals
