KS3 Nutrition
What's covered
Key facts
Diet-Related Diseases
Iron-deficiency anaemia is caused by too little dietary iron (or by blood loss), reducing haemoglobin in red blood cells.
Dietary Needs Across Life Stages
Athletes need more carbohydrate than sedentary adults to fuel exercise and refill muscle glycogen stores.
Eatwell Guide
Beans and pulses are part of the protein foods group and are a recommended protein source.
Energy and Calories
UK front-of-pack labels use a single reference intake of 2000 kcal per day for an average adult; general NHS guidance is about 2000 kcal a day for women and 2500 kcal for men.
Fibre
The UK recommended daily fibre intake for an adult is about 30 g/day.
Macronutrients: Carbohydrates
Bread is mainly starch (a complex carbohydrate); eggs/yoghurt/cheese are not predominantly carbohydrate sources.
Macronutrients: Fat
A layer of body fat helps the body keep warm in cold conditions.
Macronutrients: Protein
Proteins are made of building blocks called amino acids.
Micronutrients: Minerals
Calcium is essential for building and maintaining strong bones and teeth.
Micronutrients: Vitamins
B vitamins help the body release energy from carbohydrates, fats and proteins (they are co-factors for metabolic enzymes).
Sample questions
A taste of the 127 questions in this topic, answers marked. Sign up to practise the full set with spaced repetition.
What dietary habit is the main cause of obesity?
- •consuming too much protein in place of carbohydrates
- •eating at irregular times and skipping breakfast
- ✓eating more energy than the body uses
- •having a diet low in vitamins and minerals
Which life stage needs the most calcium?
- •adults
- •elderly
- ✓teenagers
- •toddlers
Which food group is largest in the Eatwell Guide?
- •dairy and alternatives
- ✓fruit and vegetables
- •protein foods
- •starchy carbohydrates
Which unit do most people use to track daily energy intake in the UK?
- ✓kilocalorie (kcal)
- •kilojoule (kJ)
- •the kilogram (kg)
- •the watt (W)
Which food is a good source of dietary fibre?
- •chicken breast
- •full-fat milk
- •white rice
- ✓wholegrain bread
What is the main function of carbohydrates in the body?
- •to absorb fat-soluble vitamins
- •to build and repair muscle tissue
- ✓to provide energy for body functions and activity
- •to regulate the body's fluid balance
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