Addictions to sugar can cause serious harm to physical and mental health. Too much sugar intake will cause the blood sugar level to rise and fall rapidly, causing the body's blood sugar to fluctuate. Long-term fluctuations in blood sugar can cause the body to develop hormone resistance, making the body unable to effectively use blood sugar, leading to abnormal sugar metabolism and diabetes. Addictions to sugar can also have adverse effects on heart health. A diet high in sugar increases the risk of heart disease because sugar is transported to the heart by the blood to increase the concentration of fat and fat in the blood vessels. Too much fat and fat increases the risk of heart disease and stroke. Addictions to sugar can also have adverse effects on the digestive system. High-sugar diet can cause indigestion, bloating, stomach pain, constipation, and other problems. In the long run, it may also lead to digestive diseases. Addictions to sugar can also have adverse effects on eye health. The intake of sugar will cause the accumulation of sugar in the retina of the eye, which will lead to maculopathy and affect vision. In summary, sugar addiction can cause serious harm to physical and mental health. In order to maintain physical and mental health, we should limit the intake of sugar, maintain a balanced diet, do more physical exercise and maintain a healthy lifestyle.