Vitamin B12 injections for MTHFR: Injection or sublingual B12? Methyl Life Supplements Cyanocobalamin Injection USP 1000 mcg mL CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Is it too soon to administer another vitamin B12 (cyanocobalamin) injection to a patient with a vitamin B12 level of 308 pg mL who received an injection 6 days ago for fatigue?
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contraindications to b12 injections Vitamin B12 Injections for Aging and Longevity