Objective: To study the anti-aging mechanism of Zuoguiyin (a prescription for tonifying Kindney Yin) and Yishenbao (a prescription for tonifying Kidney Yang) in presenile mice.

• 目的：探讨补肾阴方左归饮和补肾阳方益肾宝对老年前期小鼠抗衰老的机制。