what's in a vitamin b12 injection Do You Need Prescription for Injections? B12 Injection Services - Subtly
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This reduces potential confounding factors in research and provides a highly specific tool for metabolic studies

Data were subsequently normalized to the IS peak area and transformed as % control values for cross-sample comparisons

Control groups of mice were maintained on LD or WD and given sham (10 mL/kg body weight sterile saline) injections throughout the study (termed LD/LD-V, or LD control, and WD/WD-V, or WD control, groups
[DOI] [PMC free article] [PubMed] [Google Scholar] 215.Liu YL, Liang HR, Liu HT, et al
Philos Trans R Soc Lond B Biol Sci

It makes sense when you think about it most natural B12 comes from animal products
