Rebaudioside A, Rebiana, Reb A...they are various name forms of the laboratory manufactured artificial stevia-based sweetener. That high level of purity initially sounds good and fastidious, but Reb A is extracted from the natural stevia plant, isolated and then enhanced with sugar alcohol and "natural flavors." Of course, the whole plant can't compete in percentages with an artificially concentrated mere fraction of the plant. What the whole plant has that a fraction will never have is synergistic nutrition. Stevia is a member of the Chrysanthemum plant family widely grown for its sweet leaves. The sweetness found in stevia can be attributed to steviol gylcosides â€“ primarily stevioside and rebaudioside A - the sweet components of the leaf. These natural sweeteners are more than 200 times sweeter than sugar. The FDA recently approved Reb A as having GRAS (Generally Regarded As Safe) status for use in food and beverages in concentrations with 95% or higher percent purity. "It separates it completely from stevia extract, which doesn't have that kind of purity level as Reb A. The first products to hit the market with Reb A are Coca Cola's Sprite Green and Odwalla juice drinks and PepsiCo's SoBe Lifewater drinks in three flavors.