how long does injections b12 take to work Are Vitamin Shots Right for You? How Long to See Results
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Risk behaviour and time as covariates for efficacy of the HIV vaccine regimen ALVAC-HIV (vCP1521) and AIDSVAX B/E: a post-hoc analysis of the Thai phase 3 efficacy trial RV 144

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The following comparison provides the key distinctions relevant to experimental design

Meaning a 5mg dose requires only 0.1mL (10 units)

While the NIH does not specify a tolerable upper intake level for vitamin B12, a study published in the JAMA Network Open found that high intakes of vitamin B12, such as from daily supplementation of 25 micrograms or higher, increased the risk of bone fracture [3] [4]

If you experience confusion, fainting, an inability to keep fluids down, a very high body temperature, or changes in mental status, seek emergency medical care immediately