Wuzi Yanzong Pill originated from the famous tonic Chinese medicine prescription in Tang Dynasty. Because the names of five Chinese herbal medicines in its ingredients all have the word "zi", it is named Wuzi. It is used to tonify kidney yang, improve semen quality and treat infertility, and is known as "the first seed in ancient and modern times".

Main ingredients: Fructus Lycii, Semen Cuscutae (parched), Rubi Fructus, Fructus Schisandrae Chinensis (steamed) and Semen Plantaginis (parched with salt).