Jing - translated as Essence, a very precious substance, should be guarded and not wasted.

Prenatal Jing (Pre-Heaven Essence)

At conception, the Prenatal Jing is passed to the fetus from the parents.

Prenatal Jing (together with an energy derived from the Kidneys of the mother) nourishes the fetus during pregnancy.

Prenatal Jing determines basic constitution, strength, and vitality. It is fixed in quantity, determined at birth: it cannot be added to, only conserved and used up more slowly. It is stored in the Kidneys.

The way to conserve Prenatal Jing is by striving for balance in all life activities. Balance meaning moderation in diet, work/rest, sexual activity. Irregularity or excess in these areas wastes Prenatal Jing.

Certain exercises help conserve Prenatal Jing, such as breathing exercises, Taiji (Tai Chi), and Qi Gong.

Postnatal Jing (Post-Heaven Essence)

After birth, the child begins eating, drinking, and breathing independently. Its Lungs, Spleen and Stomach then begin functioning to extract and refine Qi from the food and drink it consumes and the air it breaths. Postnatal Jing is the complex of essences thus refined and extracted. Postnatal Jing depends on the functions of Stomach and Spleen.

Jing, translated as Essence, is a very precious substance, which should be guarded and not wasted.

Two main kinds: Prenatal Jing (Pre-Heaven Essence) and Postnatal Jing (Post-Heaven Essence).

Kidney Jing

  1. Kidney Jing plays important role in physiology.
  2. Is hereditary, like Prenatal Jing and determines constitution.
  3. However, is partly replenished by the Postnatal Jing.
  4. Stored in the Kidneys but has fluid nature and circulates all over the body, especially in the Eight Ancestral (Extraordinary) Vessels.
  5. Forms the basis for growth, development, sexual maturation, and reproduction.
  6. Moves in long, slow cycles, and presides over the major phases of development in life.
  7. Kidney Jing is the basis for Kidney Qi
  8. Kidney Jing produces Marrow
  9. Kidney Jing determines our Constitution
  10. Essence and Qi are the material foundation for Shen (Mind).