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Description
The body tightly regulates vitamin levels, and excess water-soluble vitamins like B12 are typically excreted in urine
MedTech Research Group provides these references for informational purposes

During fracture healing, calcium requirements increase to approximately 1200 milligrams per day, and vitamin D levels should be maintained at 30 to 50 nanograms per milliliter (serum 25-hydroxyvitamin D)

doi: 10.1111/head.12838 21

Torsvik I, Ueland PM, Markestad T, et al