Students need a significant amount of energy to perform their daily activities and primarily for normal brain function during learning and memory. One of the dietary patterns that is based on the proper intake of nutrients in accordance with the recommendations is the Mediterranean dietary pattern. According to numerous studies, the Mediterranean diet is the main traditional approach to the prevention and treatment of many diseases today, such as cardiovascular diseases, diabetes and some types of cancer. With the increase in people's interest in nutrition and the food they consume, high-quality methods, systems and indexes have been developed, which can be used to determine the quality of the diet of a certain group being examined and to compare it within the country or on a global level. The primary goal of this paper was to investigate the eating habits, beliefs and knowledge about nutrition and nutrients of health and non-health studies students at the University of Rijeka. The second goal was to find out whether knowledge about nutrition affects the quality of students' nutrition and whether there is a difference with regard to the type of study that the students or respondents attend. 350 students of the University of Rijeka participated in the research, of which 135 were male and 215 were female, aged 18 to 31. The processing of the results revealed a statistically significant difference in the body mass of students depending on the type of study, which can also be connected with the assessment of knowledge, which was rated better among students of health studies. The results on adherence to the Mediterranean diet indicate a moderate adherence of the majority of respondents to this dietary pattern. Also, the connection between knowledge about nutrition and knowledge about the components of nutrition, as well as age and year of study, was established. The current knowledge of students about nutrition is better compared to the previous knowledge recorded at the University of Rijeka, but still students of health studies have better knowledge about nutrition than those from non-health studies.