RDN Study Guide 2026
Everything you need to pass the RDN exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 RDN Exam Format at a Glance
📚 RDN Topics to Study (63)
✍️ Sample RDN Questions & Answers
1. Which type of state credential law is MOST restrictive, limiting both the title and the practice of nutrition services?
Licensure is the most restrictive form of credentialing, prohibiting both the use of protected titles and the practice of defined activities without the license.
2. A patient with short bowel syndrome has a jejunostomy with only 80 cm of remaining small bowel. Which macronutrient adaptation is most important to maximize absorption?
Continuous elemental feeding maximizes absorption surface contact time and reduces osmotic load in patients with minimal intestinal length.
3. A prospective cohort study design in nutritional epidemiology is characterized by:
Prospective cohort studies enroll disease-free individuals, collect baseline dietary data, and follow them forward over time to observe incident disease, allowing assessment of temporal exposure-outcome relationships.
4. Which study approach is most effective for Nutritional Biochemistry material?
Active recall through practice questions is the most effective study method, as it strengthens memory retrieval pathways.
5. A premature infant born at 28 weeks gestation requires parenteral nutrition. The appropriate initial protein provision should be:
Extremely premature infants require aggressive early protein provision of 3.5–4.0 g/kg/day via PN to replicate intrauterine accretion rates and support brain development.
6. A food service manager discovers that an employee has been falsifying temperature logs. Which is the FIRST appropriate step?
Proper HR practice requires documenting the incident and following established progressive discipline procedures before determining appropriate corrective action.