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Biologically-speaking we are adapted to several small doses of B12, which are consumed throughout the day, whereby each time 1.5 2 micrograms of the vitamin is absorbed via the intrinsic factor
Rare bronchospasm has been reported with glutathione, which is why a history of asthma deserves attention before administration and monitoring during it
Treatment of deficiency in adults consists of 200,000 IU given orally, starting from the diagnosis, with subsequent doses after 24 h and then after 2 weeks
Those with persistent fatigue or high stress may benefit from biweekly doses
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