Because of the increasing number of patients, chronic kidney disease (CKD) has become a significant public health problem. As kidney function decreases, it is necessary to introduce certain dietary modifications. The aim was to investigate what is the appropriate approach to diet of CKD patients, which could contribute to slowing down progression of the disease. Dietary recommendations are individual for each patient, but also vary in the same patient depending on the stage of disease progression because special attention must be paid to appropriate intake of macronutrients (protein, carbohydrates and fats), micronutrients (sodium, potassium, calcium, phosphorus, zinc, selenium, various vitamins), and water. In newly diagnosed patients, it is necessary to assess their nutritional status and energy requirements. It has been shown that protein-energy malnutrition, muscle loss and cachexia are strong predictors of mortality in CKD. Comparing different dietary approaches in everyday life of patients suffering from CKD, it was found that the most effective diet is Mediterranean food style. Studies confirm that Mediterranean diet has a preventive effect on renal function and reduces progression of the disease. Preventive measures, correct identification and early intervention can increase survival of patients and improve their quality of life. Mediterranean diet tailored to individual stages of CKD has been confirmed as the best choice in CKD patients.