Diet is a substance that supplies nutrients and acts as a substitute for organ deterioration; therefore, essential for every living thing.1 In the Unani system of medicine, there are some dietary guidelines that are suggested in order to promote health and prevent disease. The traditional Unani book describes dietary intake in terms of quality, quantity, time, combination, temperament, sequence, and seasons, among other factors. The author of this brief review essay will talk about how diet affects maintaining good health.

Methodology: Classical unani text, journals, articles, review papers were reviewed for data collection.