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I'm not sure if this advice will be appropriate for your daughter who
has a problem with constipation, hypoglycemia, gluten, and food allergies.
I have gluten intolerance which is made worse by hypoglycemia (when I
eat too much fruit or carbohydrate items) and food allergies (tomatoes
and eggs mostly).  But one thing I don't have is constipation.  I
attribute this to the amount of lettuce I eat everyday.  At least
two salads a day.

BJ