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If you are not very B12 deficient or not experiencing fatigue or nerve sensations as one of your symptoms, you may not notice the benefits until after youve had 2-3 injections over several weeks

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This process depletes cellular NAD+ and S-adenosylmethionine (SAM) two critical molecules for energy metabolism and cellular function

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Or, take a Vitamin B12 shot only under the supervision of a doctor