Semen Cuscutae. Part used: Seed. Known as Chinese Dodder Seeds. Entering meridians: Kidney and Liver. Tu Si Zi strengthens Yang, nourishes Yin, astringes Jing and urine, benefits the marrow, tonifies the kidneys and liver, improves vision, benefits the kidneys and spleen, stops diarrhea and calms the fetus. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.