Method: The seeds of Camellia japonica extract was separated into four fractions according polarity, its antiosteoporosis effective parts was investigated by a recombinant yeast screening assay.

• 方法：用系统溶剂分离法将南山茶子醇提物分成极性不同的组分，利用重组人雌激素受体基因酵母生物检测法筛选山茶抗骨质疏松的有效部位。