The Certified Nutrition Specialist credential is awarded by the Board for Certification of Nutrition Specialists (BCNS). This page is for candidates preparing for the 200-question exam. It gives you free practice sets by topic, three worked questions with full reasoning, a map of the official content areas, a study plan and answers to common questions.
The CNS has 200 questions and takes about 4 hours[1][2] (Board for Certification of Nutrition Specialists (BCNS), part of the American Nutrition Association, verified Oct 25, 2026).
Numbers in brackets link to the official sources listed under Sources & last verified. Dates that have passed are removed automatically.
According to Board for Certification of Nutrition Specialists (BCNS), part of the American Nutrition Association, “The examination contains 200 multiple-choice, single answer questions”[1]
The CNS credential is awarded by the Board for Certification of Nutrition Specialists (BCNS), part of the American Nutrition Association. The exam has 200 multiple-choice questions, each with a single answer, and candidates have 4 hours to finish. Testing takes place at ISO-Quality Testing sites in the United States and several other countries.
Results are reported on a scaled score from 100 to 1,000, and 600 is the minimum needed to pass. Score reports are emailed about 4 to 6 weeks after the exam.
The exam is offered in set test windows, not on demand. The next windows listed are December 5-13, 2026 (applications due October 5, 2026), June 5-13, 2027 (applications due April 5, 2027) and December 4-12, 2027 (applications due October 4, 2027).
The costs are a $150 non-refundable application fee, a $400 exam fee due 30 days before the test period, and an $83 fee paid to ISO-Quality Testing when you register for a test seat. If you do not pass, you can apply to retake the exam at the next offering through a re-exam application.
Once certified, you renew on a 5-year cycle by earning 75 continuing education credits that meet BCNS requirements, plus a recertification fee. Eligibility requirements depend on your education and background, so check the BCNS handbook and the American Nutrition Association site before you apply. Those are the sources to trust for current rules.
The content areas below are copied from the official CNS content outline published by Board for Certification of Nutrition Specialists (BCNS), part of the American Nutrition Association, with the share of the exam each area carries. The right-hand column shows which of our practice sets covers it.
| Official content area | Weight | Practice on this site |
|---|---|---|
| Domain III: Nutrients & Human Health[4] | 13% | Mixed practice tests above |
| Domain II: Nutritional Biochemistry[4] | 12% | Mixed practice tests above |
| Domain I: Principles of Nutrition[4] | 13% | Mixed practice tests above |
| Domain IV: Nutrition Assessment[4] | 13% | Mixed practice tests above |
| Domain V: Clinical Intervention & Monitoring[4] | 16% | Mixed practice tests above |
| Domain VIII: Practice Management[4] | 6% | Mixed practice tests above |
| Domain VII: Public Health[4] | 12% | Mixed practice tests above |
| Domain VI: Medical Nutrition Therapy (MNT)[4] | 15% | Mixed practice tests above |
Prepare for the CNS - Certified Nutrition Specialist exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.
Question: What is an audit trail in the context of documentation?
Answer: A. A chronological record that allows tracing of changes and decisions back to their source
Explanation:
The correct answer is the chronological record that lets you trace changes and decisions back to their source. That is what an audit trail does: it shows who did what, and when, so any entry can be checked later.
The physical path through the filing room is wrong because an audit trail is about records, not a location. The list of auditors is wrong because it names reviewers but does not record changes. The financial statement is wrong because audits may use financial statements, but an audit trail is not a type of statement.
Rule to remember: good documentation lets a reader reconstruct what happened and why, in order, from the record alone.
Question: Which approach best describes the integration of theory and practice in this profession?
Answer: A. Applying theoretical knowledge to solve real-world problems while adapting to specific contexts
Explanation:
The correct answer is applying theoretical knowledge to solve real-world problems while adapting to the specific context. Theory gives you the framework, and practice tests it against a particular client or setting.
Following theory exactly without modification is wrong because real situations differ, and rigid application ignores those differences. Ignoring theory and relying only on experience is wrong because experience without a framework is hard to justify or check. Using theory only during examinations is wrong because it treats knowledge as something to recall for a test, not something to use.
Rule to remember: when two options are extremes, the answer is usually the balanced one that combines evidence with judgment about the situation.
Question: What is the most important competency assessed in Emergency Procedures & Critical Care for professionals in this field?
Answer: A. Applied knowledge and practical problem-solving ability
Explanation:
The correct answer is applied knowledge and practical problem-solving ability. Emergency and critical care questions test whether you can use what you know when a situation is changing.
Memorization of textbook definitions only is wrong because recalling a definition does not show you can act on it. Years of experience without demonstrated skill is wrong because time in a role is not evidence of competence. Academic credentials without practical application is wrong because a credential shows training, not the ability to apply it.
Rule to remember: when a question asks what is assessed or valued, prefer the option that shows knowledge being used, not just held or claimed.
Start with the BCNS handbook and the American Nutrition Association page, so you know the exam format, the content areas and your test window. Count back from the application deadline for the window you want, and plan your study time from there.
Our questions are written by us with AI tools and are not real exam questions. Use them to test your understanding of concepts, and rely on the official material for what the exam covers.
The exam has 200 multiple-choice questions, each with a single answer. Candidates have 4 hours to complete it. It is delivered at ISO-Quality Testing sites in the United States and several other countries.
You need a scaled score of at least 600 on a scale from 100 to 1,000. BCNS emails score reports directly to candidates about 4 to 6 weeks after the exam.
The listed costs are a $150 non-refundable application fee, a $400 exam fee due 30 days before the test period, and an $83 test center fee paid to ISO-Quality Testing when you register. Check the American Nutrition Association site for current amounts.
It is offered in test windows. The next listed are December 5-13, 2026 (applications due October 5, 2026), June 5-13, 2027 (due April 5, 2027) and December 4-12, 2027 (due October 4, 2027).
You can retake it the next time it is offered by submitting a re-exam application. BCNS sets the details and any fees, so check the handbook and the American Nutrition Association site before you apply.
The credential runs on a 5-year recertification cycle. In each cycle you earn at least 75 continuing education credits that meet BCNS requirements and pay a recertification fee. The BCNS handbook lists the exact rules.
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