b12 injection time to work Shots at Home: How, Where & How Often Inject Yourself B12 Injection Dosage and Frequency:
Description
Methods 17 (3), 261272

On the other hand, the bioavailability of B12 from dietary supplements is 50% more than that from food sources
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Most are mild and short-lived: injection-site soreness, warmth, or redness
This can be another incredibly convenient option, as you can get your shot while youre already out running errands

Many payers limit injection frequency to prevent overutilization
