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WACS Primary study materials
WACS Primary study resources

WACS Primary: Nutrition, Dietary Requirements and Allergen Management

WACS Primary · Work through your exam, one topic at a time.

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Nutrition, Dietary Requirements and Allergen Management

Nutrition, Dietary Requirements and Allergen Management tests whether you can read a dish simultaneously as a set of nutrients and a set of risks. You need energy values, the major allergens, the difference between allergy and intolerance, and a method for adapting recipes without breaking them.

Nutrition essentials

  • Energy: carbohydrate 4 kcal/g, protein 4, fat 9, alcohol 7. Convert with 1 kcal = 4.184 kJ.
  • Common benchmarks: free sugars under 10% of energy, salt under 5 g/day, fibre around 30 g/day, five portions of fruit and vegetables.
  • Cooking loss: water-soluble vitamins (B group, C) leach into cooking water and are heat-labile, so steam or blanch briefly; fat-soluble vitamins (A, D, E, K) survive but can be lost to frying oil.
  • Salt reduction: acid, umami (mushroom, soy, anchovy) and aromatics replace sodium without blandness.

Allergens and diets

  • EU/UK 14 allergens: celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, nuts, peanuts, sesame, soya, sulphites above 10 mg/kg.
  • The US Big 9 adds sesame to the older eight.
  • Allergy is immune-mediated and trace amounts can kill; intolerance is usually dose-related (lactose); coeliac disease is autoimmune and requires lifelong gluten-free practice including cross-contact control.
  • Cross-contact transfers allergens; cross-contamination transfers microbes. Both require separate tools, boards and hands.
  • Vegan excludes all animal products; vegetarian may allow dairy and eggs; halal and kosher are certification and preparation systems, not just ingredient lists.

Worked example

A coeliac guest orders risotto. Reasoning: rice is naturally gluten-free, but the stock may contain wheat, the parmesan may be grated on a contaminated grater, and the pan may have cooked pearl barley. Check labels, use a clean pan and tools, fresh stock, and plate separately.

Traps that cost marks

Equating gluten-free with healthy; treating a 'may contain' statement as a safety guarantee; answering 'vegan' when the guest said dairy-free; forgetting sulphites in wine and dried fruit.