Traditional Chinese Medicine (TCM) believes that good health ensures a dynamic equilibrium between man and his natural environment as well as society and only when Yin and Yang are in the equilibrium that it becomes effective.

In Chinese culture, Yin and Yang represent two opposite but complementary principles in nature. Yin characterizes the feminine or negative nature of things and Yang stands for the masculine or positive side. Yin and Yang go in pairs such as the moon and sun, female and male, dark and bright, cold and hot, passive and active, etc. but they are not static or just two separated things. The nature of Yin and Yang is best understood in the interplay of the two components. Both contraries form a synthesis that is upheld by William Blake's submission in his poem The Marriage of Heaven and Hell that “without contraries, there is no progress, attraction and repulsion, good and bad, are two sides of the same coin”.

Summarily, the characteristics of Yin and Yang are opposite in nature though they are also part of nature. They rely on each other and so cannot exist without each other. The balance of Yin and Yang in Traditional Chinese Medicine is important and must be stressed for optimal health to be achieved and T.C.M is an example of one area where the Yin-Yang theory is used to understand complicated relationships in the body.

For further explanation in relation with the human body, Yin is associated with less energetic qualities as rest, inward and downward direction, cold, darkness, condensation, inhibition and nourishment while on the other hand, Yang is associated with energetic qualities like movement, outward and upward direction, heat, brightness, stimulation activity and excitement. Straightly defined, Yin is the feminine negative principal part of the body while Yang is the masculine, positive principal part of the body.

A diminished Yin can be shown as sweat, low fever, dizziness, tinnitus, emission, and soreness in the lower back etc. Yin weakness occurs with age, sexuality or chronic diseases.

GOLDEN SIX is among the most regarded ancient Chinese herbal formula. Today, it is widely used to nourish yin of the yin yang principles and is the foundation of many other Chinese medicines. In traditional Chinese medicine, Yin is the womanish and negative Principle of Yin-Yang whereas Yang is the mannish and positive principle.