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Athletes at Higher Risk Vegetarian and vegan athletes who do not regularly eat fortified foods are at an increased risk of deficiency and should test levels regularly
That half-unit can be slightly tricky to measure without a syringe that has half-unit markings, but the overall math remains straightforward
Malabsorbtion of cobalamins in cobalamin and related binding proteins in clinical nutrition
In more symptomatic gut protocols, 500 mcg twice daily may be used
It comes from United States Pharmacopeia General Chapter 797, which sets a default beyond-use date for opened multi-dose vials of any kind
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