Sweeteners are substances used to enhance the sweetness of food and beverages. They can be natural, like sugar and honey, or artificial, such as aspartame and sucralose. Sweeteners are often used as a substitute for sugar to reduce calorie intake or to cater to those with dietary restrictions, such as diabetes. There are also sugar alcohols, like xylitol and erythritol, which provide sweetness with fewer calories and a lower impact on blood sugar levels. Each type of sweetener has its own unique properties, uses, and potential health effects, making it important for consumers to choose wisely based on their needs.