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B12 shots are generally considered safe and may be recommended if you have a lab-confirmed deficiency
S2CID 34014860
, University of Miami Metabolic & wellness medicine Dr
[2] High-dose intramuscular administration creates a tissue depot that releases vitamin D slowly over weeks, potentially enabling a single injection to lift serum 25-hydroxyvitamin D levels into the sufficient range in severe deficiency and to potentially support bone mineralisation, neuromuscular function, and secondary hyperparathyroidism reversal while bypassing the gastrointestinal tract
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