Sugar is an important energy-supplying substance for the human body, but eating too much of it will bring a lot of harm to the human body, the less serious is to induce dental caries, the more serious may cause endocrine disorders leading to diabetes, hyperlipidemia and other diseases. 1. Dental caries: excessive sugar intake may cause the growth of lactobacilli in the mouth, producing more acid, thus inducing dental caries. 2. Diabetes mellitus: Long-term intake of excessive sugar and high-energy food will put the pancreatic islet cells in a long-term overload state and cause damage to the islet cells, which in turn will cause insulin deficiency, leading to elevated blood glucose and progression to diabetes mellitus, which will be complicated by peripheral neuropathy, peripheral vasculopathy, and retinopathy. 3. Hyperlipidemia: too much sugar intake can not be fully utilized will be converted into fat, causing obesity and hyperlipidemia, triggering atherosclerosis leading to hypertension, coronary heart disease and other diseases. Please strictly control the amount of sugar you consume to avoid the harm caused by over-eating. If you find abnormal blood glucose levels, it is recommended that you seek prompt medical attention.