SIRT1 protein expression, determined by western blot analysis. (A) The western blots and (B) the quantified results of SIRT1 protein expression are shown. #P<0.01 vs. Ost group. SIRT1, sirtuin 1; Ost, osteoporosis; RES, resveratrol; LD, low-dose; MD, middle-dose; HD, high-dose.