Whether eating milk sugar will be fat should be judged according to the amount of consumption, if only moderate consumption of milk sugar, usually will not be fat, but a short period of time a large number of consumption of milk sugar, it will generally lead to fat. According to the Nutrition Section Manual, milk sugar contains protein, fat, carbohydrates and other nutrients, moderate consumption can help the body to replenish energy. But usually every 100 grams of milk sugar contains 1600 to 2300 kilojoules of energy, so if you eat a lot of it, its energy will be oxidized to produce heat, excess heat will be converted into fat, leading to obesity. At the same time, milk sugar contains sugar, maltose, glucose syrup and other substances, so if you eat a lot of milk sugar may lead to part of the sugar can not be properly absorbed, and then by the human liver in the form of fat synthesized triglycerides, resulting in the human body fat. Because it is recommended to use milk sugar in moderation. It should also be noted that diabetic patients are advised to avoid consuming milk sugar, so as not to cause an increase in blood sugar after consumption.