Which herb tonifies yang, astringes, and secures essence?

• A. Shan Zhu Yu
• B. Bai Guo
• C. Shi Hu
• D. Tian Men Dong

Answer: (A)

Focusing on securing essence while supporting the body's energy is the key idea. Shan Zhu Yu (Cornus fruit) is both astringent and tonifying, making it ideal for stabilizing Jing and preventing leakage. Its sour, astringent nature helps bind and secure the essence, while it tonifies the liver and kidney, supporting the source of Jing and underlying yang function. This combination explains why it’s the best fit for a herb that tonifies yang, astringes, and secures essence.

The other herbs don’t align with this triple action. Bai Guo is more about certain astringent and qi-regulating effects but isn’t traditionally used to secure Jing. Shi Hu and Tian Men Dong are mainly yin-tonifying and moistening; they don’t emphasize securing Jing in the same way.