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Aspartame is an artificial sweetener that is used as a sugar substitute in many food and beverage products. Here are some key points about aspartame:

1. Sweetening Power: Aspartame is known for its intense sweetness. It is approximately 200 times sweeter than sugar, which means only a small amount is needed to achieve the desired sweetness.

2. Low-Calorie Sweetener: Aspartame is a low-calorie sweetener because it provides sweetness without adding a significant number of calories. It is commonly used in "diet" or "sugar-free" products as a way to reduce the overall calorie content.

3. Heat Stability: Aspartame is not heat-stable, meaning it breaks down when exposed to high temperatures. Therefore, it is typically used in products that do not require baking or prolonged cooking. However, it can be used in cold or mildly heated foods and beverages.

4. Metabolism and Safety: Aspartame is metabolized in the body into three components: aspartic acid, phenylalanine, and methanol. These components are also found naturally in many foods. Aspartame has been extensively studied for its safety, and it is approved for use by several regulatory authorities around the world, including the U.S. Food and Drug Administration (FDA), the European Food Safety Authority (EFSA), and the World Health Organization (WHO). However, individuals with phenylketonuria (PKU), a rare genetic disorder, need to avoid aspartame since their bodies cannot properly metabolize phenylalanine.

5. Wide Application: Aspartame is used in a variety of food and beverage products, such as soft drinks, chewing gum, yogurt, desserts, and tabletop sweeteners. It provides a sweet taste without the calories and can help reduce the sugar content in many foods and beverages.

6. Taste and Sweetness Profile: Aspartame is known for its clean taste and quick onset of sweetness. Unlike some other artificial sweeteners, it does not leave a bitter aftertaste. It can be a good option for individuals who desire a sugar-like taste without the associated calories.

As with any food additive, individuals with specific dietary concerns or sensitivities should consult with healthcare professionals or a registered dietitian to understand the potential impact of aspartame consumption on their health.