An orally bioavailable phytoestrogen-rich Traditional Chinese Medicine (TCM) containing extracts from the six herbs Herba epimedii, Radix dipsaci (Dipsacus root), Radix salvia miltiorrhiza (Salvia root, Danshen, red sage root), Rhizoma anemarrhenae (zhi Mu), Fructus Psoraleae (fruit of Psoralea corylifolia L), and Radix Rehmanniae (Rehmannia root, Rehmannia glutinosa, Sheng Di Huang, Rehmannia glutinosa Libosch), with potential anti-osteoporotic and bone-strengthening activities. Xianling gubao (XLGB) contains various phytochemicals, including flavonoids, coumarins, saponins, alkaloids and terpenes. Upon oral administration of XLGB, the active ingredients may strengthen bones and may treat or prevent osteoporosis, osteoarthritis, bone loss and bone fractures.