Edexcel IGCSE Biology 复习笔记 2.5.7 Humans: Balanced Diet

• A balanced diet consists of all of the food groups in the correct proportions
• The necessary key food groups are:
  • Carbohydrates
  • Proteins
  • Lipids
  • Dietary Fibre
  • Vitamins
  • Minerals (mineral ions)
  • Water

   

Food Groups Functions & Sources Table

Vitamins and minerals are required for many specific functions of the body

Malnutrition

• Having an unbalanced diet can lead to malnutrition
• Malnutrition can cause a variety of different health problems in humans

Causes & Effects of Malnutrition Table

• The nutritional requirements for individuals will vary throughout their lifetime
• An individual will still require the same key food groups, but in different quantities depending on a number of factors such as age, height, sex, activity levels, pregnancy and breastfeeding

Variations in Dietary Requirements Table

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