What to eat and when

by Susanna Cocroft

ILLUSTRATIONS

	PAGE
Susanna Cocroft	[Frontispiece]
Diagrammatic Representation of Villus	[146]

What to Eat and When

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CHAPTER I
PURPOSES OF FOOD

The purposes of food are:

To supply the material out of which the body may rebuild the tissues.

To produce heat, and to liberate muscular and mental energy.

Every particle of body substance is constantly changing. The new material for cells and tissues, the substance to supply the energy needed in the metabolic work of tearing down and rebuilding, the energy used in the digestive process of converting the food into condition to be assimilated, and the energy used in muscular, brain, and nerve movement must all be supplied by food.

Every effort of the brain in the process of thinking, every motion, and every muscular movement requires energy which the food must supply.