Foods containing much sugar may furnish a part of the day's energy. Sugar as such is not an altogether necessary food, though it is very desirable because it adds palatability to the day's meals and it is a quick fuel. It is not entirely necessary, since all the starch eaten is gradually changed to a form of sugar, glucose, before it reaches the blood. Large quantities of sugar eaten at one time may seriously damage the body, since its machinery is not adequate to care for large amounts at one time. Little children receive all the sugar that is necessary for them if they have a quart of milk a day. If more sugar than is contained in one quart of milk is used, it should be diluted with other foods and should not be used as candy except occasionally as a dessert. Large quantities of sugar may be injurious both to adults and to children. Foods containing sugar are more wholesome than sugar as such.

Foods rich in sugar are: milk, sweet fruits and vegetables, honey, molasses, sirups, sugar as such, preserves, desserts, candy.