According to WebMD, stevia is recognized as a safe food product. This natural sweetener, from a plant native to South America, is available in highly purified extract forms in many stores. According to Authority Nutrition, as of 2014, researchers believe that stevia plays a role in reducing blood pressure.
Stevia is a no-calorie sugar alternative that has been used for centuries in South America. It has been shown effective in controlling blood glucose levels in both humans and animals during laboratory testing. This alternative sweetener is available in liquid drops, dissolvable tablets and baking blends. Stevia can have a metallic aftertaste to some people.