Aspartame is a widely used artificial sweetener with a chemical structure of dipeptide, which is composed of two amino acids, aspartic acid and phenylalanine. It usually appears as white crystals or crystalline powder, similar in appearance to granulated sugar, but its sweetness is much higher, about 200 times that of sucrose. Aspartame has been widely used in food and beverages, and its main function is to reduce the sugar content and calories of food while maintaining the taste and flavor of food. Due to its extremely high sweetness, aspartame only needs a small amount to achieve a sweetness comparable to sucrose, which makes it an ideal choice in many low-sugar or sugar-free foods and beverages. For example, it is often used in sugar-free chewing gum, low-calorie beverages, low-sugar jellies and desserts to provide sweetness without adding extra calories.

Aspartame is particularly suitable for diabetics and people who need to control their weight. It can provide these people with sweetness while helping to control sugar intake, thereby reducing blood sugar fluctuations and the risk of weight gain. In addition, aspartame plays an important role in the diet of diabetics because it does not significantly affect blood sugar levels. In the field of pharmaceutical processing, aspartame also plays an important role. Many drugs, especially children's drugs and some bitter drugs, usually have a bad taste. Aspartame is used as a sweetener to mask the bad taste of drugs and make them easier to take. Its use can improve patients' compliance with medication, especially when long-term medication is required.