CDR Registration Examination for Dietitians (RD/RDN)
Medical nutrition therapy, community nutrition, management and foodservice systems -- practice for the CDR RD/RDN registration exam, with 1,000 flashcards, 350 quiz questions and a 125-question mock exam.
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Everything included — in full detail
This is exactly what you unlock. No vague promises — real numbers, straight from the portal.
Your full practice pool — 350 questions total, written to mirror the real exam blueprint, with full answer explanations for every question.
Including Principles of Dietetics, Nutrition Care for Individuals and Groups, Management of Food and Nutrition Programs and Services, and more.
A complete, realistic exam-day simulation with the same question count and time limit as the real thing.
Covering every key term, concept, and framework you're expected to know.
Hand-picked walkthroughs and explainers organized by topic.
Visual breakdowns of the frameworks and models the exam tests you on.
The exact formulas and calculations you need, ready to review before test day.
A searchable glossary so unfamiliar terminology never slows you down.
Real field-reference and career reading picked for this profession — never more exam-prep.
See your accuracy by domain, spot weak areas early, and follow a built-in study schedule.
Study anywhere — your progress syncs on the device you are using and picks up where you left off.
No subscriptions, no renewals — buy once and keep studying until you pass.
See the Registered Dietitian (RD/RDN) portal
Real screenshots — this is exactly what you'll be studying in. Click to zoom in.
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Full study portal: question bank, quiz & exam modes, flashcards, glossary, progress tracking. One-time purchase, lifetime access.
A mock exam written specifically for your order — not from the standard bank. Does not include portal access on its own. Order as many as you like; every order is a new batch, different from the one you previously purchased.
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A tougher, "exam-hard" mock exam written specifically for your order, pushed past standard difficulty. Does not include portal access on its own. Order as many as you like; every order is a new batch, different from the one you previously purchased.
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Portal Access plus one bonus Higher-Difficulty mock exam — the best-value way to start. (Extra Mock Exams can be added separately anytime, as many as you like.)
A custom set of flashcards written specifically for your order — pick how many you want. Delivered as its own unique link & code, separate from portal access.
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Our printed Registered Dietitian (RD/RDN) exam-prep guide is on its way. Get instant digital access for now.
Topics you'll drill
4 core topics pulled straight from the real question bank.
- Principles of Dietetics
- Nutrition Care for Individuals and Groups
- Management of Food and Nutrition Programs and Services
- Foodservice Systems
Registered Dietitian (RD/RDN) exam requirements & cost
Straight from the certifying body — separate from what we charge for the study portal.
The Registered Dietitian (RD), also written Registered Dietitian Nutritionist (RDN), credential is awarded by the Commission on Dietetic Registration (CDR) after you pass its registration examination for dietitians. CDR's eligibility page lists the key requirements: a minimum of a graduate degree from a USDE-recognised accredited institution (or an equivalent foreign degree), coursework from an ACEND-accredited program (a Didactic Program in Dietetics, Coordinated Program or Graduate Program), and supervised practice from an ACEND-accredited program (a Dietetic Internship, Coordinated Program, Graduate Program or a doctorate Individualized Supervised Practice Pathway). The routes are DPD plus Dietetic Internship, Coordinated Program, Graduate Program and the doctorate ISPP, with separate routes for foreign degrees and reciprocity. Once CDR approves your eligibility you receive an Authorization to Test email from Pearson VUE, normally within a week, and authorisation lasts one year at a time. CDR's handbook sets the examination fee at $250, paid by credit card to Pearson VUE when you book; the optional test bundle costs $350 in total, for the first attempt plus a voucher for a retake at a discounted $100. The exam is offered year-round at more than 250 Pearson VUE test centers, appointments must be made at least 48 hours ahead, and a refund is available only if you cancel online at least 48 hours before the appointment.
Registered Dietitian (RD/RDN) exam blueprint
Real domain weighting from the certifying body's own published exam syllabus.
- Principles of Dietetics21%
- Nutrition Care for Individuals and Groups45%
- Management of Food and Nutrition Programs and Services21%
- Foodservice Systems13%
Real pass rate, retake policy, scoring, and a study timeline for Registered Dietitian (RD/RDN) — free, no purchase required.
Common questions
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