Rebiana is the trade name for high-purity rebaudioside A, a steviol glycoside that is 200 times as sweet as sugar. It is derived from stevia leaves by steeping them in water and purifying the resultant extract to obtain the rebaudioside A.
Rebiana is the commercial designation for a highly refined form of rebaudioside A, a sweetener derived from stevia leaves through a process involving steeping and purification. This results in a compound 200 times sweeter than sugar.