الفهرس 
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Abstract
These investigations were designed to study the effect of different sources of dietary fibers such as carrot or apple peels on iron bioavailability and its relation to vitamin (A). 1- Chemical composition of wheat flour, apple and carrot peels. 2- Determination of trace minerals. 3- Farinograph properties of dough prepared from different formulas. 4- Preparation of biscuits from wheat flour substituted with apple or carrot peels at different percentages 5%, 10%, 15% and 20%. 5- Chemical, Physical and Organoleptic evaluation of different biscuit formulas.