The extract of olive leaf was purified by macroporous resin. The content of total polyphenols of purified extract was over 80%.

• 高温或阳光能降低黄酮和多酚的含量,采用大孔树脂精制油橄榄叶提取物,可获得多酚含量在80%25以上的油橄榄叶提取物。