FOODS AS BUILDING MATERIALS 11 



supplied with this valuable food substance ! In what 

 way is it useful to our bodies? In the same manner 

 that coal is to an engine. It furnishes energy for mo- 

 tion and also supplies fuel for 

 keeping the body warm. The 

 body could get along without fat, 

 because proteids can supply both 

 tissue building material and fuel. 

 However, as one ounce of fat will 

 supply about two and one-half 

 times as much heat and energy 

 as the same amount of proteid, 

 it is usually far better to have 

 fatty foods in our diet. 



When we eat sufficient fat to 

 furnish much of the heat and 

 energy our bodies need, it is pos- 

 sible for the proteids eaten to O live Branch and Fruit. 



perform their most useful work ; Olives and nuts su pp!y 



nutritious oils. The olive 



namely, building up the tissues of i s ne ari y black when ripe, 

 the body. For this reason, fats are Gr f en ol are of no 



value as food. 



of great use to growing children, 



especially those that are not naturally robust and 

 strong. Butter and cream are both very good fatty 

 foods, and olive oil is excellent. A spoonful or more 

 of the latter at each meal furnishes an excellent lubri- 

 cant for the digestive organs, as well as a very good 

 food. Many people have found this slight addition 

 to their daily diet a most effective aid to health. 



