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[A] The following conclusions are supported by good evidence:
There is strong evidence that infants and toddlers fed cow's milk generally have poorer nutritional iron status than infants not fed cow's milk.
The mechanism by which cow's milk causes gastrointestinal bleeding is not known, but intestinal sensitivity to proteins found in cow's milk, such as bovine albumin, are likely responsible. The substance in cow's milk that causes gastrointestinal blood loss is