he vital force to keep normal physiology working in equilibrium with reference to Tridosha is termed as Oja in Ayurveda. It is required for every single physiological action. Its defined swaroopa proves its physical existence. Based on characteristics, importance, actions and effects, it is related with collective forms of all neuropeptides. Neuropeptides small protein molecules present in every neuron. Minute screening of central control of every physiological action further strengthens the claim of similarity between Oja and Neuropeptides (all collectively).