Rebaudioside A is the most commercially important steviol glycoside, valued for its superior taste profile compared to stevioside and other stevia compounds. It is extracted from the leaves of Stevia rebaudiana Bertoni and purified to high concentrations (typically ≥95% or ≥97%). Higher purity Reb A delivers a cleaner, more sugar-like sweetness with reduced bitterness and licorice aftertaste. It has received GRAS status from the FDA and is approved worldwide as a natural, zero-calorie sweetener. Reb A is stable across a wide range of pH and temperature conditions, though prolonged exposure to extreme acidic conditions may cause some degradation.