It's a triple poison of sugar. Aspartame, a sugar substitute in diet coke, is obviously harmful to the body, mainly to human body fluids, and consumers don't like to use it. If acetaminophen is mixed with aspartame, it may taste more like sugar. Aspartame will hydrolyze at high temperature or high pH value, so it is not suitable for foods that need high temperature baking. However, heat resistance can be improved by combining with fat or maltodextrin. The stability of aspartame in water is mainly determined by pH value. At room temperature, it is the most stable at pH 4.3, and its half-life is about 300 days. When the pH is 7, its half-life is only a few days. However, the pH value of most drinks is between 3 and 5, so the aspartame added in the drinks is very stable. But when a long shelf life is needed, such as syrup of automatic beverage machine. Aspartame will be mixed with other stable sweeteners, such as saccharin. When aspartame is used in powder brewing beverage, the amino group of aspartame will react with the aldehyde group on some perfume compounds, resulting in the loss of sweetness and flavor at the same time. In this case, acetals can be used to protect aldehyde groups. 198 1 was approved by FDA for dry food, and 1983 was approved for use in more than 100 countries and regions around the world after being allowed to make soft drinks, and its sweetness was 200 times that of sucrose. Aspartame has the following advantages: (1) high safety, which is classified as GRAS grade (recognized as safe) by the Food Additives Committee of the United Nations, and it is the product with the most thorough research on human safety among all sugar substitutes. Up to now, it has been successfully used in more than 6000 products in many countries around the world 19 years. (2) It has pure sweetness, which is very similar to sucrose. The sweetness of aspartame is 200 times that of sucrose, and only a small amount is needed to achieve the ideal sweetness when applied. Therefore, using aspartame instead of sugar in food and beverage can significantly reduce calories and will not cause dental caries.