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(18 Mar 2011 14:59 GMT) - Although it has been known for some time that vitamin A deficiency is linked with an impaired ability to resist infections, exactly how vitamin A and its metabolites contribute to the immune response is not well understood. Somewhat paradoxically, research has indicated that vitamin A can also act as an immunosuppressive agent. Now, a study published by Cell Press in the March issue of the journal Immunity sheds light on how this critical vitamin integrates into both pro-inflammatory and anti-inflammatory immune responses in the gastrointestinal tract…
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