CLASSIFICATION OF FOOD 
 BASED ON COMPOSITION

     Foods can be classified based on chemical composition into
1. Protein
2. Carbohydrates
3. Fats and oil
4. Vitamins
5. Water and
6. Minerals

                   PROTEIN
 This are nutrients made up of large molecules of amino acids. All proteins are enzymes but not all enzymes are proteins. Proteins helps in growth, in providing supportive and protective structures and tissues, formation of enzymes and hemoglobin,etc.
                         PROTEIN SOURCES
Sources of protein includes
1 eggs
2. Meat
3. Fish
4. Groundnut
5. Beans etc


       

           
                            .

                CARBONHYDRATE
This are class of food which provide energy in the form of glucose(C6H6O12). They are formed from the as a photosynthetic product form plant when they take in carbon dioxide.  A well balanced meal should contain about 60-70% calories of carbohydrate. Also carbohydrate forms a large part of animal feed and it's sources are many.  Some of the sources include:
1. Rice
2.bread
3. Wheat
4. Oat
5. Barley
6. Maize
6. Yam
7. Cassava etc