Yakult U.S.A. introduced Yakult Light, which is a probiotic drink that contains less sugar and fewer calories than regular Yakult. Specifically, it has nearly two-thirds less sugar and one-third fewer calories than regular Yakult, resulting in 30 calories in each bottle. Yakult Light is made with natural flavors and sweeteners: it is sweetened with stevia-derived Reb A and a small amount of sugar. Like regular Yakult, it contains the proprietary active probiotic bacteria called Lactobacillus casei strain Shirota and features the same citrus flavor profile, the company says.