In this study, we examined the 70% ethanolic extract of Drynaia fortune (DF) Pseudodrynaria coronans (PC), Humata griffithiana (HG) and Davallia divaricata (DD) on calcium absorption in femal young rats and osteoporosis in ovariectomized (OVX) rats. PC, HG and DD could increase calcium (Ca) absorption, Ca absorption rate and Ca retention. In addition, PC and DD significantly prevented the osteopororsis induced by overacetomized rats.
