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A patient completes a short health assessment online, a licensed clinician reviews it, and a prescription is issued when clinically appropriate
Vitamin B12 injections have essentially no negative side effects, except for extremely rare cases in which patients are allergic or sensitive to the injection
Limited human studies : While there is a growing body of anecdotal evidence supporting its benefits, clinical trials in humans are limited
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It's popular in biohacking circles and often pops up in patient consults, but the FDA hasn't approved it for human therapy
