Among the most striking changes in pediatric practice over the past 30 years has been the gradual disappearance in the United States of the problem of calculi in children.1 Increasing attention to the nutritional problems of children is the only common factor to which this progress can be attributed. It seems highly likely, if similar attention is paid to the diet of adults in the United States and to children in the rest of the world, that tremendous strides can be made in the prevention and eradication of the stone problem. It is likely that emphasis will have to be placed on relative deficiencies within known intakes, rather than on any clear-cut single lack. Even were such progress to be carried forward as is foreseen, there would still be many stones secondary to infection and the resultant inflammatory processes within the urinary tract.
The stability of supersaturated