Registered Dietitian (RD) Exam Study Guide 2026-2027
Registered Dietitian (RD) Exam Study Guide 2026-2027
Comprehensive Review, Practice Questions, and Detailed Answer Explanations Aligned with CDR Certification
By Capra Academy · Published June 9, 2026 · 355 pages
About This Book
Comprehensive preparation for the CDR Registered Dietitian examination. Covers principles of dietetics, nutrition care for individuals and groups, medical nutrition therapy, foodservice systems, and management of nutrition programs. Includes macronutrient and micronutrient metabolism, MNT for chronic diseases, enteral and parenteral nutrition, and food safety. Practice questions with detailed rationales.
What’s Inside
- Principles of Dietetics & Food Science
- Medical Nutrition Therapy
- Enteral & Parenteral Nutrition
- Foodservice Systems & Management
- Nutrition Counseling & Education
- Practice Questions with Rationales
Frequently Asked Questions
What is the RD credential?
The RD (Registered Dietitian) from CDR is the premier credential for nutrition professionals. RDs provide medical nutrition therapy, manage nutrition programs, and counsel patients on dietary needs. Since January 2024, a master’s degree is required.
How many questions are on the RD exam?
The RD exam uses computer-adaptive testing with 125-145 questions and a 2.5-hour time limit. The number of questions varies because the test adapts to your performance level.
What score do I need to pass the RD exam?
CDR uses a scaled score of 25 on a 0-50 scale as the passing standard. The specific number of correct answers needed varies by exam form due to the computer-adaptive format.
Related Resources
RD Resource Hub
Planning Your Registered Dietitian (RD) Preparation
Who this exam information is for
This page is for candidates considering or actively preparing for the Registered Dietitian (RD). Use the linked exam resources to understand the credential, organize preparation, and identify the official requirements that must be confirmed before applying.
What to verify before scheduling
- Current eligibility and application documentation
- Current examination blueprint and domain weights
- Fees, testing windows, identification, and accommodation rules
- Question format, time limit, scoring, and score-report process
- Retake, renewal, and continuing-education policies
A practical study strategy
Begin with the current official content outline. Rank every domain by both blueprint weight and personal confidence, then spend the most time where high weight and low confidence overlap. Use practice questions diagnostically: record the tested domain, why the correct answer is best, why each distractor is weaker, and what source resolves any uncertainty.
Strengths and limitations of this study guide
The Capra Academy guide is designed to combine structured review with practice and answer explanations, making it useful for identifying weak areas and rehearsing exam-style decisions. It is a study aid—not the certifying organization’s candidate handbook, not a guarantee of a passing result, and not a substitute for current official eligibility or policy information. Requirements can change, so follow the official sources linked throughout this resource cluster.