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Confirm a covered diagnosis
Cyanocobalamin is quantitatively and rapidly absorbed from intramuscular and subcutaneous sites of injection
UKAS guidance
Consult a healthcare provider before supplementing if you: Take blood thinners (vitamin D affects clotting) Use metformin, or proton pump inhibitors (both affect B12 absorption) Have kidney disease (impairs vitamin D metabolism) Have a history of kidney stones (excess vitamin D increases risk) Are being treated for any chronic condition Testing first ensures you get the right dose
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