“Ayush” which is the period of life is a constant interaction of these three stages.
The growth of body depends on the food consumed (ingested and digested) containing significant elements which are combined together and are necessary for the growth of tissues in the body.
The building up of the tissue is represented and denoted by the “Kapha” principle. The transformation of various elements found in the body is represented as “Pitta” principle. The absorption, separation and elimination of materials, which takes place in the cells, tissues or the body on account of energy principle, is symbolically expressed as “Vata” that is - Movement.
The body is said to be “healthy” when these principles operate in harmony and it is said to be “diseased” when theses factor get vitiated or imbalanced