Nutritional Analysis (AQA GCSE Food Preparation & Nutrition)

Revision Note

Cara Head

Written by: Cara Head

Reviewed by: Lára Marie McIvor

How to carry out nutritional analysis

  • A nutritional analysis is used to find out the nutrient values of a recipe, meal or diet

  • Each ingredient has a nutrient value which can be sourced from food tables or nutritional analysis software

  • Nutritional analysis can be used to plan and modify recipes, meals and diets to reflect the nutritional guidelines for a healthy diet

    • In the UK, the Eatwell Plate should be referred to when planning meals, thus recipes and diets should be modified to reflect this

    • Ingredients and cooking methods can be changed to ensure meals are nutritionally balanced, e.g.:

      • Salt and sugar can be replaced with a variety of herbs and spices, or natural sweeteners such as dates or honey

      • Wholegrain carbohydrates can be used instead of white rice and pasta which will increase fibre intake

      • Leaner cuts of meat can be used instead of high-fat choices such as sausages

    • Portion size can be controlled to follow recommended daily energy intakes

    • Overall diet can be modified to suit a person's needs e.g.

      • Someone who is obese may need a diet with lower fat intake

      • A diabetic person will need to manage and modify the sugars and carbohydrates consumed

      • A vegan diet will need careful consideration to replace proteins found in meat and ensure daily requirements are met

Using food tables for nutritional analysis

  • Food tables list ingredients alphabetically or by group to show the amount of nutrients per 100 g of food

  • The nutrient value may need to be converted into the quantity required for a specific recipe (which may not be 100 g)

Food table example

Food per 100 g

Energy (kcal)

Protein (g)

Fat (g)

Carbohydrate (g)

Lamb

294

25

19

0

Lemon

29

1

0

9

Lettuce

14

1

0

3

Lentils

116

9

0.5

20

Worked Example

A recipe requires 85 g of lentils.

Calculate the amount of carbohydrate contained in the lentils for this recipe.

Step 1 Use a food table (above) to determine the amount of carbohydrate in 100 g of lentils

Lentils contain 20 g carbohydrate per 100 g

Step 2 Divide by 100 g to determine grams of carbohydrate per 1 g

20 / 100 = 0.2 g carbohydrate per 1 g

Step 3 Multiply by 85 g

0.2 x 85 = 17 g carbohydrate in 85 g of lentils

Using nutritional analysis software

  • Many online nutritional software are available to determine the nutritional analysis of food

    • The food ingredient is searched for

    • The mass or volume required for recipes or diets can be adjusted

    • Portions per person can also be calculated

    • The nutrients and energy for the specific portions and weights required will be shown

    • Some programs allow comparisons of nutritional values to recommended guidelines

Examiner Tips and Tricks

You can easily convert between millilitres and grams for different recipes or nutritional analysis data e.g. 100 g milk = 100 ml of milk

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Cara Head

Author: Cara Head

Expertise: Biology Content Creator

Cara graduated from the University of Exeter in 2005 with a degree in Biological Sciences. She has fifteen years of experience teaching the Sciences at KS3 to KS5, and Psychology at A-Level. Cara has taught in a range of secondary schools across the South West of England before joining the team at SME. Cara is passionate about Biology and creating resources that bring the subject alive and deepen students' understanding

Lára Marie McIvor

Author: Lára Marie McIvor

Expertise: Biology Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.