Sugar is one of the three major nutrients required by the human body, but if too much is consumed, it will bring adverse effects to the body, such as obesity, dental caries, etc. It will also affect the absorption of calcium. Specific hazards are as follows: 1, obesity, cardiovascular disease: after eating too much sugar, the body calorie intake can not be absorbed and used by the body, into fat hoarding, resulting in fat, inducing cardiovascular disease; 2, oral disease: eating too much sugar, and failed to do a good job of oral cleaning, especially children, for the oral bacteria provide space for reproduction, will cause dental caries and oral ulcers; 3, bone disease. Sugar intake will increase the consumption of alkaline substances in the body, such as calcium, which affects the establishment and absorption of bones, making the chance of fracture increase; 4, eye diseases: the increase of blood sugar content in the blood may cause changes in atrial fluid or crystal osmotic pressure, and it will make the elasticity of intraocular tissues decrease, which will easily trigger myopia or aggravate the degree of myopia; 5, skin diseases: excessive sugar intake will aggravate the burden on the skin, because sugar will Increase the accumulation of free radicals in the skin, prone to large pores, increased oil, poor elasticity and other phenomena, but also prone to acne; 6, high blood sugar: If the people who have abnormal pancreatic function eat too much sugar, the body does not have insulin regulation balance blood sugar, will lead to an increase in blood sugar.