YanVive (Jin Kui Shen Qi Wan, Jin Kui Shen Qi Pian, Jin Gui Shen Qi Wan, Ba Wei Di Huang Wan, Golden Book Teapills, Rehmannia eight) is among the most regarded ancient Chinese herbal formulas. Today, it is most widely used to nourish Yang of the Yin-Yang principles. In traditional Chinese medicine, Yang is the masculine and positive principle of Yin-Yang whereas Yin is the feminine and negative principle. A robust interaction and balance of Yin-Yang forms the basis of good health. A diminished Yang can exhibit itself as soreness in the lower back, cold feeling in the lower part of the body, pale complexion, impotence, premature ejaculation, etc. Yang declines with age, sexual activity, or chronic disease.