Energizing and Slimming Through Complete Nutrition Iams Weight Control is the healthy way to help pets lose weight without losing energy. Formulated with 10% less fat than Original formulas, this vet-recommended diet contains a special blend of carbohydrates in combination with the fat-burner L-Carnitine to keep pets energized and feeling full, so they can gradually return to a healthier weight. Enhanced with vitamins, minerals and energy-boosting amino acids for 100% complete and balanced nutrition for life.