Steviol-glycoside-KOMISIYO-AMABWIRIZA-EU-No-11312011.pdf SHAKA Steviol Glycosides wo muri Stevia rebaudiana Bertoni JECFA 2017 SHAKA Amashanyarazi SHAKA Amategeko n'amabwiriza yerekeye Steviol Glycoside_Austrilia SHAKA