Stevia is a sugar substitute with zero calories that is also safe for use by diabetics. It has been used for centuries by other cultures not only as a food sweetener, but for medicinal purposes as well. Unlike chemically manufactured sweeteners, (some of the most popular being Sweet’N Low, Equal, and Splenda), Stevia’s molecules are not created in a lab.

Here is a link, separate from the article below, on the history of Stevia.