Essence, or Jing, is a very unique concept in Traditional Chinese Medicine. It is responsible for developmental progress from conception to death. Essence is considered one of the sacred treasures that all people aquired from their parents, yet each of us will have varying degree of this Essence depending on our genetic lineage. Kidney Essence Deficiency will display through incomplete developmental processes in childhood development or in the process of aging. Also, if an individual has weak Essence, then conceiving a child may become a much harder task than usual. It is important that Essence is preserved and cultivated throughout life, not just for your own health, but for the health of your prodigy.