Banlangen is the instant mix of two forms of the herb, both the below ground part and the upper plant part with stems and leaves. This product includes mannitol, a sweetener made from glucose only, no fructose, in the mix to make it easier to drink. The package comes with 16 sachets ready to use. Just add hot water. You may wish to make this two or three times a day and consume each one. Or use it at the direction of your herbal practitioner. The scientific name is Isatis indigotica. The package says sugar free. It means table sugar free. This is not a low calorie food.