Kidney Tonic (Yang) is designed to treat Kidney yang deficiency. Chronic illness may consume the body’s yang qi, causing low energy and lethargy. Lack of the Kidney yang may lead to internal coldness, resulting in aversion to cold and cold extremities. In males, Kidney yang deficiency often leads to sexual and reproductive disorders, such as impotence, premature ejaculation, spermatorrhea, and low sperm count. Kidney yang deficiency can also cause weakness in the urinary function of the body, leading to frequent urination and urinary incontinence. Kidney yang deficiency may impair its functions to regulate water metabolism, leading to edema of the lower legs and loose stools. Because the kidney is located in the low back, Kidney deficiency may cause weakness in the lower back and knees.

Kidney Tonic (Yang) has Rou Gui (Cortex Cinnamomi), Fu Zi (Radix Aconiti Lateralis Praeparata), Suo Yang (Herba Cynomorii), Jiu Cai Zi (Semen Allii Tuberose), and Lu Jiao Shuang (Cornu Cervi Degelatinatum) to warm the Kidney yang and raise the ming men (life gate) fire. Du Zhong (Cortex Eucommiae) enhances the Kidney to treat low back pain and soreness associated with yang deficiency. According to the yin-yang theory of mutual dependence, to effectively tonify the Kidney yang, the Kidney yin also needs to be nourished. Therefore, this formula also has Shu Di Huang (Radix Rehmanniae Praeparata), Shan Zhu Yu (Fructus Corni), Shan Yao (Rhizoma Dioscoreae), and Tu Si Zi (Semen Cuscutae) to nourish the yin and replenish jing (essence). Dang Gui (Radix Angelicae Sinensis) tonifies blood and nourishes the Liver. Zhi Gan Cao (Radix et Rhizoma Glycyrrhizae Praeparata cum Melle) harmonizes the formula.

In conclusion, Kidney Tonic (Yang) tonifies the Kidney yang and treats related biomedical disorders.