b12 injection histamine intolerance Excess Vitamin And Intolerance: A Genetic Link Can a DNA Test Show

Transdermal forms of vitamin B 12 are available over the counter, but this route of administration has not been validated clinically in the setting of vitamin B 12 deficiency and should not be relied upon for treatment

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Special Precautions

Once the 28-day refrigerated-use window is included, that works out to three 80 mg vials at the low 1.6 mg dose, three at the standard 3.2 mg dose, or four at the elevated 4.8 mg dose