Renal Nutrition Board Certification References

The Renal Nutrition Certification (RNC) is a credential awarded by the NKF in partnership with the AND. It validates a registered dietitians expertise in caring for patients with kidney disease. This page provides a concise, evidencebased collection of the most frequently cited references that support the knowledge domains examined on the RNC exam.

Core Content Areas

The certification exam is organized into four broad sections:

1. Kidney Physiology & Pathophysiology
2. Medical Nutrition Therapy (MNT) for Acute & Chronic Kidney Disease
3. Clinical Management & Interdisciplinary Care
4. Professional Practice & Ethics

1. Kidney Physiology & Pathophysiology

Understanding normal renal function and the mechanisms of injury is essential for interpreting laboratory data and tailoring nutrition interventions.

• Guyton AC, Hall JE. Textbook of Medical Physiology. 13th ed. Philadelphia: Saunders; 2016. Chapter 38.
• Johnson RJ, et al. Pathophysiology of Chronic Kidney Disease. Kidney Int. 2022;102(3):425437. doi:10.1016/j.kint.2022.01.014
• Leonard J, et al. Glomerular Filtration Rate: Concepts and Calculation. Clin J Am Soc Nephrol. 2021;16(5):720732.

2. Medical Nutrition Therapy (MNT)

These references cover the evidence base for protein, sodium, potassium, phosphorus, and fluid management across the CKD continuum.

• Kalantar-Zadeh K, Fouque D. Nutritional Management of Chronic Kidney Disease. N Engl J Med. 2020;383:16011613. doi:10.1056/NEJMra1915686
• National Kidney Foundation. KDOQI Clinical Practice Guideline for Nutrition in CKD: 2023 Update. kidney.org
• Musso CG, et al. Protein Requirements in Dialysis Patients. Adv Nutr. 2021;12(5):15791591.
• Rhee CM, et al. Phosphorus Management in CKD. Kidney Int Rep. 2022;7(9):18141825.
• Rossi E, et al. Sodium Restriction and Blood Pressure Control in Advanced CKD. Hypertension. 2021;78(2):562570.
• Winearls L, etal. Potassium Homeostasis in Dialysis. Clin J Am Soc Nephrol. 2020;15(10):13321340.

3. Clinical Management & Interdisciplinary Care

Effective communication with nephrologists, nurses, and social workers is critical for achieving patientcentered outcomes.

• American Society for Parenteral and Enteral Nutrition. ASPEN Nutrition Care Process for Renal Patients. 2022.
• Lambert J, et al. Nutrition Assessment Tools in CKD. J Ren Nutr. 2023;33(4):227240.
• Miller W, et al. Shared DecisionMaking in CKD Nutrition. Kidney Med. 2022;4(5):100365.
• Worley DB, et al. Management of MalnutritionInflammation Complex Syndrome. Clin Nephrol. 2021;95(6):235247.

4. Professional Practice & Ethics

These sources address scope of practice, credentialing standards, and ethical considerations specific to renal dietetics.

• Academy of Nutrition and Dietetics. Scope of Practice for Dietitians in Renal Nutrition. 2023.
• National Kidney Foundation. Ethical Guidelines for Dietitians Working with CKD Populations. 2022.
• American Dietetic Association. Continuing Professional Education and Maintenance of Certification for RNC. J Acad Nutr Diet. 2020;120(8):13191325.

How to Use This List

Each reference was selected for its relevance to the four exam content domains. When studying, consider the following approach:

1. Read the guideline summaries first. KDOQI and NKF documents provide concise recommendations and are frequently quoted in exam questions.
2. Deepdive into primary research. Articles from NEJM, Kidney International, and Clinical Journal of the American Society of Nephrology give the mechanistic background needed for physiologybased questions.
3. Apply clinical tools. Review the ASPEN care process and nutrition assessment instruments to prepare for casebased items.
4. Refresh policy and ethics. The professional practice references help you answer questions about credentialing, scope, and patient confidentiality.

Additional Resources

Beyond the core references, the following resources are valuable for continued learning:

• National Kidney Foundation website patient education handouts and webinars.
• Academy of Nutrition and Dietetics Renal Dietetics Practice Group forums and recent research alerts.
• Canadian Dietetic Association Renal Nutrition Section international perspective.
• Books:
  • Renal Nutrition Therapy (2nded.) by R. Smellie & J. Craig comprehensive text for exam preparation.
  • Nutrition in Chronic Kidney Disease edited by KalantarZadeh concise clinical guide.

Study Tips for RNC Exam Candidates

• Create a concept map linking kidney function, laboratory values, and dietary modifications.
• Practice with case studies. Write a brief MNT plan for a hypothetical patient with stage4 CKD, then compare it to the guidelines.
• Use flashcards for nutrient thresholds (e.g., protein0.60.8g/kg ideal body weight for nondialysis CKD).
• Stay current. New KDOQI updates are released every 35years; make a habit of checking the NKF website quarterly.

With focused study using the references above, candidates can confidently demonstrate mastery of renal nutrition science and practice.