Metabolic syndrome is actually a disease out of eating, of which the dangers of eating more sugar is already known to women and children, but there are still many friends like sweets? Therefore, there are many sweeteners came into being, high fructose syrup (artificial fructose) is one of them. Since fructose does not cause a significant increase in blood sugar, it is not easily decomposed by microorganisms in the mouth and has a low likelihood of dental caries, and the main food sources of fructose are fruits and honey, so fructose has always been considered a healthy food. Since the 1980s, high fructose syrup has been widely used around the world. In April 2004, Bray et al. found that the trend of obesity growth in the United States over the past 20 years closely coincided with the use of high fructose syrup in beverages and foods. To date, 2/3 of U.S. adults are overweight and 1/3 are obese, as Bray et al. suggest that high fructose syrup may be responsible for the obesity epidemic in the United States. In a recent study, adults who were overweight or obese were randomly divided into two groups: one group drank three fructose-containing beverages per day and one group drank the same amount of glucose beverages, and after 10 weeks, relevant indicators were tested. In addition, animal studies have also found that high fructose intake can significantly damage the renal tubular structure of rats compared to high glucose intake, and has a negative effect on calcium and phosphorus metabolism in the body. Therefore, the use of high fructose syrup has been drastically reduced in American society, but in China, high fructose syrup is still packaged as “healthy and green food”, which should attract the attention of clinicians and renal patients. Since fructose is unhealthy, how can patients with metabolic syndrome choose sugary or low-sugar foods? It is not that fructose is unhealthy, but the intake of large amounts of artificial fructose such as so-called “high fructose syrup” and “corn syrup” is harmful. For example, a 355ml can of beverage (such as Coke, etc.) contains roughly 20-25 grams of fructose, which can provide 630kJ of calories, while each 100 grams of fruit usually contains only 1-5 grams of fructose, so it is recommended to minimize the intake of canned beverages and use more fresh fruits and vegetables. Of course, if the daily fructose intake is less than 50 grams, it is generally less likely to have adverse effects on blood lipids and body weight. Therefore, the main thing in life is to control the intake, especially young people should be more careful not to use canned beverages as water.