Registered Dietitian RD/RDN Study Guide 2026–2027 | 200 Practice Questions

Prepare for the CDR Registration Examination for Dietitians (RD/RDN exam) with a complete study guide organized around the current CDR test specifications. Each section follows an exam domain, from Nutrition Care for Individuals and Groups (45%) to Foodservice Systems (13%), and every chapter ends with an Exam Focus summary of the facts and distinctions most often tested.

This 285-page digital guide pairs an in-depth content review with two 100-question practice tests of case-based, exam-level questions and calculations weighted like the real exam, so you practice the assessment, diagnosis, MNT, nutrition support, management and foodservice decisions the RD exam rewards.

What's Inside

• An overview of the current exam: 125–145 adaptive questions in 3 hours, the scaled score of 25 needed to pass, eligibility, fees, retakes, and how computer adaptive testing works, plus a guide to where each topic sits in CDR's next test specifications
• Principles of Dietetics: macronutrients, digestion and metabolism, vitamins and minerals, DRIs, life-cycle nutrition, food labeling, food science, counseling and behavior-change theory, motivational interviewing, and research methods and statistics
• Nutrition Care for Individuals and Groups: screening and assessment, anthropometric and energy calculations, NFPE, laboratory interpretation, PES statements, Academy/ASPEN and GLIM malnutrition criteria, community nutrition programs, MNT for diabetes, cardiovascular disease, obesity and bariatric surgery, GI, liver, pancreas, renal, pulmonary, critical care, wounds, oncology, neurology, eating disorders, inborn errors, food allergies, and enteral and parenteral nutrition with worked calculations
• Management of Food and Nutrition Programs and Services: management functions, leadership and motivation theory, HR and employment law, FTEs, budgets, break-even analysis, financial ratios, reimbursement, marketing, quality improvement tools, regulation, Code of Ethics, and HIPAA
• Foodservice Systems: menu planning and engineering, pricing, purchasing and inventory, yield and recipe conversion, production and service systems, Food Code temperatures, HACCP, sanitation, equipment, facility layout, and sustainability
• Labeled diagrams (GI tract, bariatric procedures, IDDSI framework, break-even chart, foodservice workflow), 300+ quick-reference tables, charts, and worked calculations
• A Final Review Checklist, 6-, 10-, and 14-week study schedules, FAQs, test-taking strategies for an adaptive exam, and recommended resources
• 2 practice tests (200 questions) weighted like the CDR specifications, with a separate answer key explaining every answer

Format

• Instant digital download (PDF), 8.5 × 11 in
• Clickable table of contents
• Print it or study on a tablet, laptop, or phone

Please note: This is a digital product. No physical item will be shipped.

RD, RDN, Registered Dietitian and Registered Dietitian Nutritionist are trademarks and certification marks owned by the Academy of Nutrition and Dietetics and the Commission on Dietetic Registration (CDR). Test Treasure Publication is not affiliated with or endorsed by CDR, the Academy, or any testing organization; all exam and organization names referenced are trademarks of their respective owners.