Kids need more than milk to develop strong bones, according to researchers from the Center for Food and Health at the University of Ulster in Northern Ireland. They discovered that 12-year-old girls who ate high amounts of fruit had significantly higher bone mineral density than moderate fruit-eaters (American Journal of Clinical Nutrition, 2004, vol. 80, no. 4). The alkaline-forming properties in fruits may help with mineral absorption and acid-base balancing, the study suggested.