Double toned milk contains as low as 1.5 percent fat. Being low in fat, it helps maintain cholesterol levels in your body, hence keeping the heart healthy. Easily digestible Double toned is a good source of complete milk that contains all the nine amino acids. A cup of (240 Ml) double toned milk provides you as much as 7.7 g of protein. This milk contains high amounts of casein protein, which is easily digestible. Contains fewer calories Double toned milk is low in calories as compared to toned milk.