The distribution of values was tested by the one-sample KS test, and data are presented as the mean +/ SD or as median and IQR, where appropriate
For instance, a study by Grace et al., on lambs receiving a single 2 mg subcutaneous B12 injection demonstrated significant increases in serum and liver B12 concentrations for up to 24 days compared to untreated animals (2)
B12 shots help most when you have a true deficiency or a reason you cannot absorb B12, not as a universal energy booster

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If you are using a compounded product and you were not told it contains B12, but the liquid is pink, contact your pharmacy immediately to confirm the formulation
References Journal of Pharmaceutical Drug Delivery Research (2022) Pawar K