“Healthy” has a specific meaning to the US FDA. Under US FDA guidelines a food (or food component) must meet specific nutrient requirements to use the term “healthy” in its name or in claims made about the product. As an ingredient with no nutritive value, stevia cannot legally be classified as “healthy.”
While stevia may not be rich with vitamins and minerals, it can play a vital role in helping people maintain a healthy, balanced diet. Swapping a stevia-based sweetener for full-calorie sugar in baking, cooking, and beverages can be part of a successful weight management strategy. In addition, using stevia rather than sugar throughout the day can help you achieve your calorie intake goals. In this sense, stevia can play a role in helping you live a healthier lifestyle.
Read more about the FDA’s definition of “healthy” here.