Ayurveda is the science of life and its main aim is to maintain healthy status of living being. Prevention and treatment of disease is the essence of Ayurveda. As per ayurvedic science, Nidra is one among most essential factors responsible for a healthy life. It is one of the Trayopsthambha. The lifestyle changes of this era have led to various disorders. The article lays emphasis on the ancient wisdom of Ayurveda about the importance of Nidra-physiological and critical review on study of Nidra. It also overviews and lights up the main study of Nidra already given in different ayurvedic texts. The ancient ayurvedic classics describes the 3 main milestones of life Ahara, Nidra and Brahmacharya. The entire study of Nidra and its classification is given in samhitas. The lifestyle changes have led to disorders like hypertension, obesity, diabetes mellitus and others. Good sleep is essential and advantageous to the quality of life. A number of vital physiological changes occur during sleep and help people stay healthy and function at their best.
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