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Because absorption is limited, raising serum B12 with pills is a gradual, cumulative process that can take weeks or months of consistent daily use
These act as diluents or vehicles for certain medications that are to be administered via the parenteral route
FDA (September 2025) Compounding and the FDA: Questions and Answers USP (n.d.) USP Quality Standards for Compounding Editorial Policy: Science-Backed, Expert-Reviewed The Edge upholds the highest standards of health journalism
Foods like meat, eggs, and dairy can provide B12, but some people find it hard to absorb through digestion
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