Unani is a system of alternative medicine which is primarily originated in Greece and is practiced now in India. Unani medicine is used in the prevention and treatment of disease by including the use of herbal remedies, dietary practices, and alternative therapy. Unani is based on the theory of the presence of some elements in the fluid and the balance of this fluid is essential for health and imbalance to result in the illness. These fluids are called the four humours (blood, phlegm, yellow bile, and black bile). Though the scientific research on Unani medicine’s health effect is limited, the animal study of certain Unani treatments provides some health benefits such as arthritis, cataract and brain health.