Metabolic syndrome (MetS) increases the risk of developing diabetes and cardiovascular disease risk factors that are linked with each other, which is a metabolic dysfunction, which contains a combination of multiple. It is known that METS plays a role in the development of many diseases such as cardiovascular diseases, stroke, cancer, Alzheimer's. Studies have revealed that neuroinflammation, oxidative stress, abnormal lipid metabolism and impaired vascularization, which play a role in the pathogenesis of MetS, affect the structure of the brain and cognition. Atherosclerosis of the carotid artery, increased brain atrophy and white matter damage are potential explanatory mechanisms that lead to an impact on cognitive skills in patients with MetS. In addition, the existence of MetS components such as obesity, diabetes, hypertension alone also negatively affects cognitive functions, and the level of cognitive influence also increases as the number of components an individual has increases. The literature reports that learning, executive functions, processing speed, attention/working memory and global cognitive functions are affected in individuals with MetS, but no consensus has been reached on this issue. Some studies say that MetS causes a significant decrease in cognitive functions, while some studies indicate that this difference is not significant. The aim of our study is to proof the relationship between MetS and cognitive functions with metabolic syndrome components. H1:There is a relationship between the MetS and cognitive functions.