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Amanda Shea, fractional chief science officer at Clue, said: We know that immune function fluctuates across the menstrual cycle, yet its still rarely considered in mainstream health research
Typically, the positive effects last from about a week up to a month, though this can vary based on how your body absorbs and utilizes the vitamin, as well as your overall health
Selected Literature Supporting B12 Research de Groot CP et al., Am J Clin Nutr 1999 Elderly absorption and dietary adequacy
Formulations of cyanocobalamin injection containing benzyl alcohol as a preservative should also be avoided in premature neonates and those with hypersensitivity due to its association with gasping syndrome.[15][16][20] Monitoring: A history of the patients allergies/hypersensitivity should be obtained before administering cyanocobalamin injection
Finally, safety is paramount
Nayana Shetty, MBBS, MD When to See a Doctor Although rare, some people may experience side effects of high vitamin B12 levels such as headaches or skin reactions
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