Food and Nutrition Expertise: CDRE Guide & Sample Questions

What Food and Nutrition Expertise covers on the CDRE

This domain is the science floor the rest of the exam stands on. It maps to ICDEP Competency 1, which asks entry-level dietitians to apply an understanding of food science, human nutrition, and dietary requirements to practice. The performance indicators run from 1.01 apply understanding of food composition and food science and 1.02 apply understanding of food environments, through 1.03 human nutrition and metabolism, 1.04 dietary requirements and guidelines, and 1.05 dietary practices, and finish with three "integrate" indicators, 1.06 nutrition care principles, 1.07 population health promotion principles, and 1.08 quantity food provision principles. Those last three are the tell: this domain is designed to feed into the others.

At roughly 7% of the exam (about 13 questions), Food and Nutrition Expertise is the lowest-weight domain on the CDRE blueprint. Do not treat that as permission to skip it. The knowledge here, lab interpretation, macro and micronutrient function, food composition, gets reused constantly inside Nutrition Care questions, where the weight is far heavier. A shaky grasp of hemoglobin or acid-base balance costs you points in two domains, not one. Think of this as the cheapest high-leverage studying you can do.

Key topics to know

Food science and composition. How foods behave chemically and physically, because it drives both texture-modified diets and quantity cooking.

• Water — solvent, heat-transfer medium, and the variable behind water activity and food spoilage.
• Starches and gelation — starch granules absorb water and thicken (gelatinize) with heat; retrogradation explains staling and sauce weeping.
• Sugars and crystallization — controlled crystal size decides whether a product is fudge-smooth or grainy; sugar also drives browning and preservation.
• Proteins and denaturation — heat, acid, and mechanical action unfold proteins; this underlies egg coagulation, meat firming, and milk curdling.
• Dairy — milk proteins (casein, whey), curdling with acid or rennet, and how heat changes flavour and stability.
• Eggs — coagulation, foaming, and emulsifying functions that make eggs a structural workhorse in cooking and baking.
• Meat and fish — connective tissue, myoglobin and colour, and moist versus dry heat for tenderness.
• Effects of cooking and processing — Maillard browning, caramelization, and nutrient losses (water-soluble vitamins lost to heat and leaching).

Food additives and sweeteners. What they do and why they are on a label.

• Additives — preservatives, emulsifiers, stabilizers, colours, and leavening agents, each with a defined technical function.
• Artificial and non-nutritive sweeteners — aspartame, sucralose, acesulfame-K, and steviol glycosides; know sources, relative sweetness, and Health Canada permitted use.

Functional foods and bioactives. Increasingly examined as clients ask about them.

• Probiotics — live micro-organisms that may confer a health benefit.
• Prebiotics — non-digestible fibres (e.g., inulin) that feed beneficial gut bacteria.
• Nutraceuticals and phytochemicals — bioactive compounds (carotenoids, flavonoids, phytosterols) studied for effects beyond basic nutrition.

Fundamentals of human nutrition. The core physiology the exam expects cold.

• Macronutrients — carbohydrate, protein, and fat: digestion, absorption, and energy yields (4, 4, and 9 kcal/g; alcohol at 7).
• Micronutrients — key vitamins and minerals, their functions, food sources, and classic deficiency and toxicity signs.
• Energy metabolism — basal metabolic rate, thermic effect of food, and the glucose, fatty-acid, and amino-acid pathways.
• Fluid and electrolytes — sodium, potassium, and chloride and their role in hydration and cellular function.
• Acid-base balance — the buffer systems and respiratory and renal compensation behind metabolic acidosis and alkalosis.

Laboratory assessment and interpretation. You will read values inside cases.

• Hematology — hemoglobin and hematocrit for anemia; MCV and MCHC to classify it as microcytic (iron deficiency) or macrocytic (B12/folate).
• Electrolytes — sodium, potassium, chloride, and their common clinical shifts.
• Protein status — albumin and prealbumin, and why inflammation limits their use as pure nutrition markers.
• Glycemic and lipid markers — fasting glucose, HbA1c, and a standard lipid panel.
• Renal markers — creatinine and BUN as context for fluid and protein needs.

Dietary requirements and guidelines. The Canadian reference frame.

• Dietary Reference Intakes (DRIs) — EAR, RDA, AI, and UL, and when each applies.
• Canada's Food Guide (2019) — the plate model, plant-forward proportions, and water as the drink of choice.
• Dietary practices — cultural, religious, and vegetarian or vegan patterns and their nutrient-adequacy considerations.

How the CDRE tests this domain

Expect very little bare recall. Questions wrap the science in a short scenario, then ask you to apply it: a lab panel and a question about the most likely nutrient issue, a cooking-method choice for a texture-modified diet, or a client question about a sweetener or probiotic. The cognitive level sits mostly at application and analysis, consistent with the rest of the exam.

It helps to place this against Miller's pyramid, the classic model of clinical competence with four rungs: knows, knows how, shows how, and does. A written multiple-choice exam like the CDRE lives mainly on the second rung — knows how, the ability to apply knowledge — rather than the bottom knows rung of pure recall. Its case-based questions reach toward shows how by simulating a practice decision on paper. No written exam can assess does (real performance in practice); that is what your internship and supervised hours confirm. So in this domain, memorising the facts gets you onto the first rung only. The marks come from being able to use those facts inside a case, which is the level the CDRE is built to measure.

Common traps: choosing a technically true statement that does not answer the question asked; treating a single abnormal lab value as diagnostic while ignoring hydration or inflammation; confusing prebiotics with probiotics; and reaching for a supplement when a food-first answer is expected. Read for the best answer in the Canadian context, not merely a correct one.

Sample questions

Try this the way you would on the exam: pick the best answer, then check the rationale.

For the sample question from each of the other six domains, and a method for getting more out of free practice, see free CDRE practice questions.

How to study this domain

Because the weight is low but the reuse is high, study for transfer, not for a big score on this section alone. Build a one-page reference of the lab values above, then drill them inside clinical cases rather than as flat flashcards, so hemoglobin, MCV, albumin, and electrolytes become second nature when a Nutrition Care question hands you a full panel. Keep a compact table of macro and micronutrient functions, deficiency signs, and food sources; those sources double as counselling answers.

For food science, learn the reaction (gelation, crystallization, denaturation, Maillard) and one everyday example of each, which is usually enough to reason through an exam item. Skim Canada's Food Guide (2019) and the DRI categories so guideline questions become automatic. Then stop; do not over-invest here at the expense of heavier domains. A couple of focused sessions plus mixed case practice is the right dose.

The fastest way to see whether this domain is actually solid is to answer Canadian, case-based questions and read every rationale. Start with the free 20-question assessment to get a baseline, then follow the method in the complete CDRE study guide and the week-by-week study plan. When you are ready, see how this science carries into Nutrition Care and Food Provision.