Introduction::
TThe beginning of renal replacement therapy is generally connected with changing dietary habits. A positive phosphate balance is a major clinical problem, often observed in haemodialysis patients. The treatment of hyperphosphataemia is based primarily on dietary intervention and the use of phosphate binders – medications which bind phosphorus in the gastrointestinal tract. Properly conducted education of patients with CKD helps to perceive the risks resulting from an improper diet.

Material and methods::
The diagnostic survey method with author's own survey questionnaire was used in the study. The survey contained closed questions concerning the knowledge of dietary recommendations for haemodialysis patients enabling the maintenance of the recommended phosphatemia. Statistical analysis was performed with SAS 9.4 software (SAS Institute Inc., Cary, North Carolina, USA), assuming the statistical significance level p < 0.05. The following tests were applied: chi-squared test/Fisher's exact test, due to the small size of subgroups – the Kruskal-Wallis test for comparison of three groups, and the Mann-Whitney U test to compare the two groups.

Results::
Haemodialysis patients were aware of the need for restrictions on the consumption of products with a high phosphorus content, but had problems choosing those recommended when composing meals. The right set of meats was chosen by 44 patients (36%). Dairy consumption in a moderate amount was declared by 74 people (61%). 46 respon-dents (38%) reduced their egg yolk consumption. Out of the range of available cheeses, 92 respondents (76%) declared the consumption of mainly curd cheese. The right set of bakery products was indicated by 31 patients (26%), and 73 patients (60%) avoided carbonated beverages.

Conclusions::
Patients' knowledge concerning the possibilities of preventing hyperphosphataemia was far from insufficient.