Stevia extract comes from the Stevia rebaudiana plant and is a natural, zero-calorie sweetener. It is highly purified to concentrate sweet steviol glycosides and distinguish it from artificial sweeteners that are chemically made. Stevia is widely used in foods, beverages, and healthcare products due to its safety, sweetness potency, and health benefits such as blood sugar control and antioxidant effects. Its botanical origin and regulatory approvals emphasize its role as a natural alternative to sugar.