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FOODS 



Careful experiment has shown that the average, full- 

 grown American needs each day two to three ounces of 

 proteins, about four ounces of fats, and a pound of carbo- 

 hydrates. The weight of food eaten, however, is very 

 much greater than this, as all foods are composed largely of 

 water, and contain other substances which the body throws 



off as waste. The pro- 

 teins are needed for 

 growth and repair, since 

 the living part of the 

 cells, the protoplasm, is 

 composed of proteins. 



All foods furnish 

 energy when they are 

 oxidized in the body. 

 Until recently it was 

 thought that a great deal 

 of meat was necessary to 

 furnish the energy re- 

 quired for hard muscular 

 work. But investigation 

 has shown that this 

 energy can better be sup- 

 plied by carbohydrates 

 and fats. When carbo- 

 hydrates and fats are 



oxidized in the body to produce energy, the waste is largely 

 water and carbon dioxide, which the body readily throws off. 

 But when for lack of carbohydrates the body is compelled to 

 oxidize proteins to produce energy, certain nitrogen wastes 

 are produced which the body does not throw off so easily. 

 Continued strain of throwing off these poisonous wastes in 



A BUNCH OF DATES 

 An excellent food for hot climates. 



