Study conducted to determine whether fructose is a contributor to metabolic co-morbidity in children: a convenience cohort within-subject intervention with repeated measures, stratified by racial/ethnic group (Latinos vs. African Americans vs. Caucasians). The intervention consisted of restricting fructose ingestion only to naturally-occurring fructose in fruits and vegetables (approximately 15 gm/day for 10 days), by substituting complex carbohydrate for excess dietary fructose, while maintaining neutral energy balance. Fructose restriction numerous metabolic benefits. Relevant to Metabolic Syndrome, Insulin Resistance, Hyperinsulinism, Glucose Metabolism Disorders, Metabolic Diseases.