The aim of Ayurveda is to restore and maintain the equilibrium of dhatus (the constituents) for health and happiness. Dhatus are the products of the five elements and form the material basis of the body. The disequilibrium of dhatus or ill health (physical and mental) is caused, in the ultimate analysis, by their non-use, excessive use or misuse of time, intellect and sense objects. Therapeutics seek to lower or raise the levels of constituents and restore the equilibrium by administering measures with opposite properties. Transformation of food to balance the dhatus is brought about by agents such as fire which digests, vata which evaporates, moisture that loosens, fat which softens, time which matures and, lastly, proper application. The products may be assimilated (aharadhatus) or harmful (waste or maladhatus). Perturbation of vata, pitta, and kapha (doshavaishamya) corresponds to dhatuvaishamya, because doshas are also dhatus. Equilibrium of dhatus is not achieved by merely balan...