The effect of vitamin C and carotene derived from authentic or natural sources on intestinal iron absorption was studied. Vitamin C caused slight enhancement to iron absorption, while carotene hindered it. The three juices tested, namely orange, parsley and pepper, which were found to be rich in these two vitamins, hindered intestinal iron absorption to different extents. It was recommended that patients suffering from iron deficiency are not supplied with nutrients rich in carotene particulary during iron therapy.
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