Wild Leek is a plant of the onion family native to the Chinese province of Shanxi. Jiu cai zi refers to the seeds of the plant, recommended in TCM to stimulate male libido and enhance sexual vitality.

Jiu cai zi strengthens above all the Kidneys, the main organs of sexual functions in TCM. In addition, the plant overcomes sexual discomforts such as erectile dysfunction and it increases fertility in men. Thus, Jiu cai zi strengthens sexual vitality while boosting fertility.