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All three deliver nicotinamide adenine dinucleotide (NAD+) a coenzyme essential for cellular energy, DNA repair, and longevity but they differ dramatically in bioavailability, time commitment, cost, and convenience
While B12 injections are generally safe, side effects like redness, swelling, or pain can occur
B12 shot also produces red blood cells necessary for the nervous system to function correctly
Also, if you notice any skin condition changes, contact your doctor
Kopchick, J
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