100+ Free DACBN Practice Questions

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Question 1

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Which is the BEST evidence-based recommendation for sports hydration in events lasting >60-90 minutes in heat?

Drink only plain water at maximum tolerable rates

Restrict all fluid to avoid hyponatremia

Drink isotonic beverages only after exercise

Use a fluid with carbohydrate (~30-60 g/hour) and sodium (~300-700 mg/L), individualizing rate to sweat losses (~0.4-0.8 L/hour)

to track

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Key Facts: DACBN Exam

DACBN is a 150-item, 3-hour-45-minute multiple-choice exam administered by the American Clinical Board of Nutrition. Eligibility requires a doctoral healthcare degree, 300 postdoctoral hours of clinical nutrition coursework, and a peer-reviewed clinical nutrition publication. Pass-fail is criterion-referenced; annual recertification (CE plus dues) maintains active status.

Sample DACBN Practice Questions

Try these sample questions to test your DACBN exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A 54-year-old patient with no chronic disease consumes 2,400 kcal/day. Using the Acceptable Macronutrient Distribution Ranges (AMDR) from the Dietary Reference Intakes, which daily intake is OUT of range?

A.Carbohydrate 320 g (53% kcal)

B.Protein 90 g (15% kcal)

C.Fat 90 g (34% kcal)

D.Carbohydrate 200 g (33% kcal)

Explanation: The DRI AMDR for adults is 45-65% kcal carbohydrate, 10-35% kcal protein, and 20-35% kcal fat. 200 g carbohydrate at 2,400 kcal supplies only 33% of kcal, below the 45% lower bound, and would be flagged as outside the AMDR. The other three values all fall within their respective AMDR windows.

2Which of the following macronutrients yields approximately 7 kcal per gram?

A.Protein

B.Carbohydrate

C.Alcohol

D.Saturated fat

Explanation: The Atwater factors used in nutrition assessment are 4 kcal/g for carbohydrate and protein, 9 kcal/g for fat, and 7 kcal/g for alcohol. Knowing alcohol's energy density is essential when calculating intake in patients with NAFLD, weight-management concerns, or hypertriglyceridemia.

3A patient asks why their dietitian recommended carbohydrate before a long run instead of more fat. Which physiologic principle BEST explains this advice for high-intensity endurance work?

A.Fat oxidation rates are too slow to fully fuel intensities above ~75% VO2max

B.Carbohydrate stores in the liver alone can fuel a marathon

C.Beta-oxidation does not occur during exercise

D.Protein becomes the primary fuel above 70% VO2max

Explanation: At higher relative intensities (>~70-75% VO2max), the rate of ATP demand exceeds what fat oxidation can supply, so muscle and liver glycogen become the dominant fuel. This is why endurance athletes carbohydrate-load and refuel mid-event despite having ample fat stores. Protein contribution remains low (<5-10%) except in glycogen-depleted states.

4A 30-year-old vegan patient has macrocytic anemia, elevated methylmalonic acid (MMA), and elevated homocysteine. Which deficiency is MOST consistent with this lab pattern?

A.Folate deficiency

B.Vitamin B12 (cobalamin) deficiency

C.Iron deficiency

D.Vitamin B6 deficiency

Explanation: Both folate and B12 deficiency cause macrocytic anemia and elevated homocysteine, but only B12 deficiency elevates methylmalonic acid (MMA). MMA is the specific differentiator because B12 is a required cofactor for methylmalonyl-CoA mutase. Vegans are at high risk because B12 is essentially absent from plant foods.

5Which laboratory marker is the MOST sensitive single indicator of iron stores in a non-inflammatory state?

A.Hemoglobin

B.Serum iron

C.Serum ferritin

D.Mean corpuscular volume (MCV)

Explanation: Serum ferritin reflects total body iron stores and is the most sensitive single test when inflammation is absent. Hemoglobin and MCV change only after stores are depleted and erythropoiesis is affected, so they are late markers. Because ferritin is an acute-phase reactant, it should be interpreted alongside hs-CRP when inflammation is suspected.

6The Tolerable Upper Intake Level (UL) for vitamin D in healthy adults set by the Institute of Medicine is:

A.1,000 IU/day

B.2,000 IU/day

C.4,000 IU/day

D.10,000 IU/day

Explanation: The IOM (now NAM) set the UL for vitamin D in adults at 4,000 IU/day. The RDA is 600 IU/day (ages 1-70) and 800 IU/day for >70. Although higher therapeutic doses are sometimes used for documented deficiency, the UL is the chronic upper limit for the general population.

7A 65-year-old patient on metformin for 8 years complains of paresthesias and fatigue. CBC shows MCV 108, hemoglobin 11.2. Which deficiency is most likely?

A.Folate deficiency from metformin

B.Iron deficiency from metformin

C.Vitamin B12 deficiency from metformin

D.Magnesium deficiency from metformin

Explanation: Chronic metformin use impairs intestinal B12 absorption and is a well-documented cause of macrocytic anemia and neuropathy. Guidelines (ADA Standards of Care) recommend periodic B12 screening for patients on long-term metformin, especially in older adults with neuropathic symptoms.

8Which dietary pattern has the STRONGEST randomized-trial evidence for reducing cardiovascular events in primary prevention?

A.Low-carbohydrate ketogenic diet

B.Mediterranean diet supplemented with extra virgin olive oil or nuts (PREDIMED)

C.Very-low-fat vegetarian diet

D.Paleolithic diet

Explanation: The PREDIMED trial randomized >7,000 high-risk adults to a Mediterranean diet with extra virgin olive oil, a Mediterranean diet with mixed nuts, or a low-fat control, and showed about a 30% relative reduction in major CV events. It remains the strongest RCT evidence in primary prevention. Other patterns have observational or smaller trial data but not equivalent event-reduction RCTs.

9DASH dietary recommendations to lower blood pressure typically include all of the following EXCEPT:

A.Increased fruits and vegetables (8-10 servings/day)

B.Sodium <= 2,300 mg/day (1,500 mg further reduction)

C.Saturated fat <= 6% of kcal

D.Avoidance of all dairy products

Explanation: DASH explicitly INCLUDES 2-3 servings of low-fat dairy per day as a calcium and protein source linked to BP reduction. Recommended changes are increased fruits/vegetables, reduced sodium, reduced saturated fat, low-fat dairy, whole grains, and nuts/legumes. Eliminating all dairy is not part of DASH.

10A 45-year-old patient has triglycerides 480 mg/dL and HDL 32 mg/dL. Which nutrition intervention has the most direct triglyceride-lowering evidence?

A.Increase dietary cholesterol

B.Marine omega-3 (EPA/DHA) 2-4 g/day

C.High-protein animal diet

D.High fructose intake

Explanation: Marine omega-3 fatty acids (EPA/DHA) at 2-4 g/day lower triglycerides by 20-50% in a dose-dependent manner and are recommended by the AHA for severe hypertriglyceridemia. High fructose intake actually raises triglycerides via hepatic de novo lipogenesis. Alcohol restriction and weight loss are additional first-line interventions.

About the DACBN Exam

The DACBN credential recognizes doctoral-level healthcare providers (most commonly chiropractors but also MDs, DOs, NDs, PharmDs, and qualified PhDs) with advanced clinical nutrition expertise. The 150-question, multiple-choice exam covers the ACBN six-domain blueprint: History (19%), Examination (19%), Assessment (15%), Diagnosis (15%), Treatment (19%), and Follow-Up (13%).

Questions

150 scored questions

Time Limit

3 hours 45 minutes

Passing Score

Criterion-referenced (set by ACBN)

Exam Fee

$750 (APACBN associate exam fee); diplomate-level total cost varies by application cycle and prerequisites (American Clinical Board of Nutrition (ACBN))

DACBN Exam Content Outline

19%

History

Nutrition-focused history, 24-hour recall, food frequency questionnaire, lifestyle, medications, supplements, allergies, family and social history

19%

Examination

Anthropometrics (BMI, waist circumference, skinfolds), DXA and BIA body composition, clinical signs of micronutrient deficiency, grip strength, functional assessment

15%

Assessment

Lab interpretation: lipid panel, A1c, fasting glucose/insulin, CMP, CBC with ferritin and iron studies, vitamin D, B12/MMA, folate, homocysteine, hs-CRP, urinary iodine

15%

Diagnosis

Differential diagnosis of nutrient deficiencies, food allergy vs intolerance vs sensitivity, celiac vs non-celiac gluten sensitivity, malabsorption syndromes

19%

Treatment

Medical nutrition therapy for CVD, T2D, CKD, NAFLD/cirrhosis, IBD/IBS, autoimmune disease, obesity, oncology; evidence-based supplementation; drug-nutrient interactions

13%

Follow-Up

Outcome monitoring, behavior change, motivational interviewing, scope of practice, ethics, evidence appraisal (PICO, systematic reviews, GRADE)

How to Pass the DACBN Exam

What You Need to Know

Passing score: Criterion-referenced (set by ACBN)
Exam length: 150 questions
Time limit: 3 hours 45 minutes
Exam fee: $750 (APACBN associate exam fee); diplomate-level total cost varies by application cycle and prerequisites

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

DACBN Study Tips from Top Performers

1Build a single-page cheat sheet for macronutrient distribution ranges (AMDR) and energy yield (kcal/g) of carbohydrate, protein, fat, and alcohol

2Memorize key RDAs, ULs, and the clinical signs of deficiency for vitamins A, C, D, E, K, B1, B2, B3, B6, B12, folate, and minerals iron, zinc, iodine, selenium, magnesium

3Practice MNT decisions for CVD (DASH/Mediterranean), T2D (carbohydrate counting, GLP-1 era), CKD (protein/phosphorus/potassium per stage), and NAFLD

4Drill lab interpretation: ferritin vs TIBC vs transferrin saturation for iron, MMA/homocysteine for B12 vs folate, 25-OH vitamin D ranges

5Learn FODMAP basics, celiac vs NCGS workup, and IBD nutrition (Crohn vs UC) including iron and B12 implications

6Know the most clinically important herb-drug interactions (St John's wort, warfarin + vitamin K foods, grapefruit + CYP3A4)

7Review evidence appraisal: PICO, systematic review vs meta-analysis, RCT vs cohort vs case-control, GRADE strength of evidence

8Practice scope-of-practice and ethics scenarios: when to refer to RD, MD, or specialist instead of treating in chiropractic nutrition scope

Frequently Asked Questions

What is the DACBN exam format?

Proctored 150-question multiple-choice examination, 3 hours 45 minutes in length, covering six domains: history, examination, assessment, diagnosis, treatment, and follow-up.

Who is eligible to sit for the DACBN exam?

Candidates must hold a doctoral degree in a healthcare field (DC, MD, DO, ND, PharmD, or PhD in nutrition/food science), complete 300 postdoctoral hours of academic clinical nutrition coursework, and publish a clinical nutrition article in a peer-reviewed journal.

How much does the DACBN exam cost?

The associate-level APACBN exam fee is published at $750. Total cost for the full diplomate pathway including required postdoctoral hours, application, and publication review varies by cycle and prerequisite program.

Is the DACBN passing standard a fixed percentage?

No. ACBN uses a criterion-referenced standard set for each form; it does not publish a fixed passing percentage or per-cycle pass rates.

How is DACBN recertification maintained?

Annual recertification is mandatory and requires submission of continuing education and active dues. Failure to submit annual requirements results in decertification. Emeritus status is available for fully retired practitioners with reduced requirements.

Is DACBN only for chiropractors?

No. While historically chiropractic-aligned, ACBN explicitly accepts DC, MD, DO, ND, PharmD, optometrists, and qualified PhDs in nutrition or food science.

Does the DACBN cover supplements and drug-nutrient interactions?

Yes. The Treatment domain (19%) explicitly tests evidence-based supplementation (omega-3, vitamin D, magnesium, iron, B12, folate, etc.) and common drug-nutrient interactions encountered in clinical practice.