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For observational studies reporting serum vitamin B12 levels, the certainty of evidence was upgraded from low to moderate due to the large and consistent magnitude of effect across studies, despite heterogeneity
What are the storage requirements
Vitamin B12 supports the production of red blood cells and aids in cell regeneration
Higher Potency: Injections often contain a more concentrated dose, ideal for those severely deficient
This improves energy levels and reduces fatigue
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