There has been a good deal of excitement about the promise of stevia as a natural alternative to artificial sweeteners. Rebaudioside A, also known as Reb A and rebiana, is a high-intensity sweetener derived from the stevia leaf. It is said to be approximately 200 times sweeter than sugar.
The majority of the science has found that stevia is safe for use as a sweetener for foods and beverages. Scientists are currently exploring ways to mask the liquorice or bitter flavors associated with the Reb A stevia extract. Attempts have included examining taste responses to Rebaudioside A “at a cellular level” to using natural masking flavors to cover the bitter aftertaste.
Stevia glycosides (SGs) have been reported to not only sweeten but also have some health benefits, including effects on blood pressure and blood sugar levels. A report from Indian researchers in 2007 also found that stevia may be a rich source of antioxidants and may protect against DNA damage and cancer.