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While oral B12 supplements are available, vitamin B12 injections have advantages including enhanced absorption since it bypasses digestion, a fast-acting energy boost from quick absorption, higher blood levels reached versus pills, lasting benefits between maintenance doses, improved concentration and mental clarity, and often more affordable and convenient long-term

People have claimed that it heals joints, fixes gut problems, and even sharpens their minds with minimal side effects

I dont see why one would take the path of a proper drug approval if there is now this less rigorous, alternative path to market, he said

Lancet Rheumatol 2:e653e655