Planning for Vegetarians and Vegans

This lesson covers how to plan nutritionally balanced diets for vegetarians and vegans, as required by AQA GCSE Food Preparation and Nutrition specification 8585, section 3.2.3. You must understand the different types of vegetarianism, the nutrients at risk of deficiency, and how to ensure a complete and balanced diet without meat or animal products.

---

Types of Vegetarian Diets

Diet Type	What They Eat	What They Avoid
Lacto-ovo-vegetarian	Dairy products and eggs, plus all plant foods	Meat, poultry, fish, and shellfish
Lacto-vegetarian	Dairy products, but not eggs, plus all plant foods	Meat, poultry, fish, shellfish, and eggs
Ovo-vegetarian	Eggs, but not dairy, plus all plant foods	Meat, poultry, fish, shellfish, and dairy
Vegan	Only plant-based foods	All animal products: meat, fish, dairy, eggs, honey, gelatin
Pescatarian	Fish and shellfish, dairy, eggs, plus all plant foods	Meat and poultry (not technically vegetarian, but often discussed alongside)

Exam Tip: The most commonly examined types are lacto-ovo-vegetarian and vegan. Make sure you know the difference and can identify which nutrients each group is most at risk of lacking.

---

Nutrients at Risk of Deficiency

When meat, fish, or all animal products are removed from the diet, certain nutrients must be obtained from alternative sources. The main nutrients at risk are:

For Vegetarians (Lacto-Ovo)

Nutrient	Risk	Alternative Sources
Protein	Low risk — eggs and dairy provide high biological value (HBV) protein	Eggs, milk, cheese, yoghurt, soya, Quorn, beans, lentils, nuts
Iron	Moderate risk — plant iron (non-haem) is less easily absorbed than meat iron (haem)	Fortified cereals, dark green leafy vegetables, beans, lentils, dried fruit, tofu
Omega-3	Moderate risk — oily fish is the best source	Walnuts, flaxseeds, chia seeds, rapeseed oil, algae-based supplements
Vitamin B12	Low risk — present in dairy and eggs	Milk, cheese, eggs, fortified cereals, yeast extract (Marmite)

For Vegans

Nutrient	Risk	Alternative Sources
Protein	Moderate risk — plant proteins are generally low biological value (LBV) and may lack one or more essential amino acids	Soya (HBV), tofu, tempeh, beans, lentils, chickpeas, nuts, seeds, quinoa. Use protein complementation.
Vitamin B12	High risk — naturally found almost exclusively in animal products	Fortified plant milks, fortified cereals, fortified nutritional yeast, yeast extract, B12 supplements
Calcium	High risk — no dairy	Fortified soya/oat/almond milk, tofu set with calcium, kale, broccoli, sesame seeds, fortified orange juice
Iron	Moderate risk — only non-haem iron available	Fortified cereals, lentils, chickpeas, beans, tofu, dark green vegetables, dried apricots
Vitamin D	Moderate risk — limited food sources without dairy or oily fish	Fortified plant milks, fortified cereals, mushrooms exposed to UV light, supplements, sunlight
Omega-3	High risk — no fish	Flaxseeds, chia seeds, walnuts, hemp seeds, rapeseed oil, algae-based omega-3 supplements
Iodine	High risk — dairy is the main UK source	Seaweed (in moderation), iodine supplements, fortified plant milks (check labels)
Zinc	Moderate risk — best sources are meat and shellfish	Wholegrain cereals, nuts, seeds, beans, lentils, tofu

---

Protein Complementation

Protein complementation is the practice of combining two or more low biological value (LBV) protein foods so that together they provide all the essential amino acids the body needs. This is particularly important for vegans, since most plant proteins are LBV (i.e. they are missing or low in one or more essential amino acids).

How It Works

Different plant proteins are deficient in different amino acids. By eating a combination of plant proteins, the amino acid missing in one food is provided by the other.

Food 1	Amino Acid It Lacks	Food 2	Amino Acid It Provides	Combined Meal
Cereals (bread, rice, pasta)	Lysine	Pulses (beans, lentils, chickpeas)	Lysine	Beans on toast, rice and lentil dhal, hummus with pitta bread
Pulses (beans, lentils)	Methionine	Cereals (bread, rice)	Methionine	Lentil soup with a bread roll
Nuts/seeds	Lysine	Pulses (beans, lentils)	Lysine	Bean and nut stir-fry

Exam Tip: You do not need to eat complementary proteins in the same meal — eating them over the course of the same day is sufficient. However, in the exam, it is easiest to demonstrate your understanding by planning them in the same meal.

graph TD
    A["Protein Complementation"] --> B["Cereals<br/>(low in lysine)"]
    A --> C["Pulses<br/>(low in methionine)"]
    A --> D["Nuts & Seeds<br/>(low in lysine)"]

    B -->|"combine"| E["Cereals + Pulses<br/>= All Essential Amino Acids<br/>e.g. beans on toast"]
    C -->|"combine"| E
    D -->|"combine"| F["Nuts + Pulses<br/>= All Essential Amino Acids<br/>e.g. bean & cashew curry"]
    C -->|"combine"| F