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  • Food, Nutrition and Diet
    • Balanced diet
      • All organisms require food to survive. It provides energy and the raw materials for growth.
    • Types of food groups;
      • Carbohydrates are required by our bodies as a source of energy. (eg. Rice, Potatoes)
      • Fats are needed to insulate our bodies and to make cell membranes. They also contain fat-soluble vitamins. (eg. Cheese, Butter)
      • Proteins are required for growth and repair. (eg. Fish, Meat)
        • The amounts and types of protein is important. Proteins from animals are called first class proteins because they contain more amino acids compared to plant proteins.
      • Minerals are different elements (eg. iron)
      • Fibre is important because it allows the muscles in our intestines to move the material along and prevents constipation. (eg. Fruit, Bread)
      • Water is important because it keeps your body hydrated and all chemical reactions take place in water.
      • Vitamins are different structures. (eg. Vitamin C prevents scurvy)
    • The exact amount of each substance that is needed in a balanced diet will vary. It depends on your age, gender and how active they are.
      • You can find out the exact amound by estimatting the RDA. (recommended daily average)
        • RDA in grams = 0.75 x body mass in kg
    • Video on A balanced diet
    • Macronutrients
      • Nutrients are substances needed for growth, metabolism and for other body functions.
      • They are nutrients that provide calories or energy
      • Three broad classes of macronutrients which are proteins, carbohydrates and fats.


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