Introduction: Obesity is a pathology with multifactorial etiology. A high percentage of body fat favors the development of numerous comorbidities such as chronic kidney disease (CKD). This work aims to evaluate the percentage of fat in healthy adults with changes in kidney function. Methods: the sample consisted of participants of both sexes, aged 18 years or over. Data collection was carried out through a questionnaire with sociodemographic questions and lifestyle habits, and measurement of anthropometric measurements and blood pressure. For statistical analysis, SPSS software version 19.0 was used. Results: The sample consisted of 244 participants, 76.2% (n=186) were female and 23.8% (n=58) were male. The average age was 46.14 ± 15.19 years. 56.6% (n=138) are healthy adults and 43.4% (n=106) have changes in renal function. The variables weight, WC and WC presented higher mean values in the renal group in relation to the group of healthy adults, and the variables age, BMI, WHtR, Cpes, SBP and DBP presented a higher median value. Finally, there was a high prevalence of altered BF% in the renal group in relation to the control (healthy group). Conclusion: based on the results obtained, the importance of monitoring the nutritional status of patients with CKD is confirmed, in order to maintain an adequate nutritional status, control metabolic changes and control the progression of kidney damage, providing a better quality of life for these patients. population.