Functions of the Kidneys
The Kidneys produce marrow, fill up the brain and control bones.
Commentary: The Kidney Essence is responsible for the production and function of marrow, bones and the brain. Marrow in Chinese Medicine is a substance that is the common matrix of bones, bone marrow, brain and spinal cord. If the Kidney Essence is strong, the bones will be strong. If the Kidney Essence is weak, particularly the Yin aspect, the bones are not adequately nourished. The bones become brittle, and osteoporosis can develop. A weak Kidney Essence in children causes poor bone development and can cause pigeon-chest, for example. The teeth belong in the category of bones. If the Kidney Essence is weak, the teeth will be loose. The Kidney Essence produces marrow, which generates the spinal cord and fills up the brain. If the Kidney Essence is strong, it will nourish the brain, memory and concentration, thinking and sight as well. A weak Kidney Essence can lead to poor memory, poor concentration, dizziness, dull thinking and poor sight. Also feelings of lightheadedness can be caused by an impaired Kidney function.