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Vitamin B12 is water-soluble, which means excess amounts are usually excreted in urine
Room temperature is the documented storage condition, so travel at ambient temperature is acceptable as long as sustained heat exposure (hot car interiors, checked luggage in cargo holds during summer) is avoided
Injections are particularly good in these cases, as they bypass the tract for higher absorption rates than with food or oral supplements
Vitamin B12 is not a substitute for folic acid and since it might improve folic acid deficient megaloblastic anemia, indiscriminate use of vitamin B12 could mask the true diagnosis
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