Nestle Nutrition Caloreen Caloreen is a neutral tasting carbohydrate supplement (glucose polymer powder), for those who are unable to meet their energy requirements from everyday foods & fluids, whether you have a fluid restricted diet & need a source of extra carbohydrate, or your energy needs cannot be met with liquid supplements. Caloreen is fructose, glucose & gluten free. Ingredients: Maltodextrin. Not for intravenous use. Not suitable for children under 3 years of age.