Potential off-target effects: broad changes to methylation could, in theory, affect gene expression in ways not yet characterised
Even if your health insurance covers B12 injections, depending on your insurance plan, you might still be required to pay a copay or coinsurance or reach your deductible
The most common side effect is simply pain at the injection site
Typically, patients start with one or two injections per week for four weeks and then switch to one injection a month, depending on their needs
Proponents of B12 shots claim they turbocharge the metabolism (read: make you thinner), strengthen the immune system, and help cure fatigue, insomnia, even depression