The differences between icing sugar and white sugar are minimal nutritionally speaking. Icing sugar has a slightly higher calcium content than white sugar. Both icing sugar and white sugar are extracted from sugar cane and sugar beets, and both fall under the category of sucrose, although icing sugar is formed by recrystallization under certain circumstances. Each 100 grams of rock sugar contains 397 calories, including 99.3 grams of carbohydrates, 0.1 grams of protein, and 23 milligrams of calcium. Every 100 grams of white sugar contains 398 calories, 98.9 grams of carbohydrates, 0.1 grams of protein, calcium 6 mg. As you can see, the nutritional composition between the two is more or less the same, the calcium content of icing sugar is slightly higher than the calcium content of white sugar. Usual life should be based on their own preferences, moderate choice of icing sugar or white sugar consumption, but both are added sugar, excessive consumption will lead to weight gain and other risks, is not conducive to good health. Diabetic patients should be careful with icing sugar and white sugar.