Traditional Chinese Medicine considers the kidneys to be extremely important and multifaceted in the human body. They contain the primordial yin and yang, the home of water and fire, the foundation of innate nature, and the root of life. Deficiency or stagnation of primordial yang can restrict reproductive, hematopoietic, growth, and immune functions, leading to a variety of illnesses. Therefore, nourishing primordial qi and strengthening kidney yang are key approaches to treating or preventing disease.