Fructus Psoraliae. Part used: Fruit. Known as Psoraliae Fruit. Entering meridians: kidney and spleen. Bu Gu Zhi tonifies the kidneys, strengthens Yang, stabilises Jing, astringes urine, tonifies and warms spleen Yang, stops diarrhoea and topically for vitiligo. All Phoenix Medical dry authentic herbs and concentrated herbal granules are free of sulphur, herbicides and pesticides.