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These processes include DNA synthesis, red blood cell formation, energy production, nerve cell health, and general neurological function

Any disruption along this pathway can lead to deficiency regardless of dietary intake, which is why some patients need supplementation even when they eat B12-rich foods

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This malabsorption can stem from an autoimmune response, ushering in a scenario where the body mistakenly attacks its cells and tissues

These create a feedback loop, all influenced by NAD+ levels