Notes: Steviolbioside is a natural non-caloric sweetener and glycoside that has been found in S. rebaudiana leaves and an active metabolite of rebaudioside A (Item No. 11894).{65705} It inhibits the proliferation of MDA-MB-231 breast cancer cells when used at a concentration of 250 µg/ml. Steviolbioside is active against M. tuberculosis (MIC = 3.75 µg/ml).{65706}