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Why Gradual Improvement Is More Common Skin cells regenerate over weeks, not overnight
Because your intestines can only absorb so much at once, and your kidneys continuously waste it, a single large daily dose would simply be excreted, leaving your heart and muscles unprotected for the rest of the day [11] [7]
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Considerations for Patients with Malabsorption Disorders Those with malabsorption issues, like celiac disease or Crohns disease, might need more B12
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