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Clin Infect Dis 64:565571
It is not FDA-approved
it also recommends that people over 50 receive half the RDA from fortified foods or supplements because that form of B12 is not bound to protein and is easier to absorb (IOM, 1998)
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Mechanistic studies examine its interactions with nitric oxide signaling, prostaglandin pathways, and gastrointestinal dopamine and serotonin turnover, including their relevance to experimental models of intestinal inflammation and gastrointestinal dysfunction
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