The nano Liuwei Dihuang can increase the quantity of SOD in blood serum of old rats remarkably.So the effects of fighting against senium can be improved.

• 小鼠血清对邻苯三酚自氧化速率抑制实验证明，六味地黄纳米化后，有效成分可直接溶出，可显著增加老龄小鼠血清中的SOD，抗衰老的药效得到明显改善。