Our bodies use different nutrients in different ways as shown in Box 5.
BOX 5 • IMPORTANT USES OF SOME NUTRIENTS
Nutrient Main use in the body
Macronutrients
Carbohydrates - starches and sugars To provide energy needed to keep the body breathing and alive, for movement and warmth, and for growth and repair of tissues. Some starch and sugar is changed to body fat.
Carbohydrates - dietary fibre Fibre makes faeces soft and bulky and absorbs harmful chemicals, and so helps to keep the gut healthy. It slows digestion and absorption of nutrients in meals, and helps to prevent obesity.
Fats To provide a concentrated source of energy and the fatty acids needed for growth and health. Fat aids the absorp-tion of some vitamins such as vitamin A.
Proteins To build cells, body fluids, antibodies and other parts of the immune system. Sometimes proteins are used for energy.
Water To make fluids such as tears, sweat and urine, and to allow chemical processes to happen in the body.
Our bodies use different nutrients in different ways as shown in Box 5.
BOX 5 • IMPORTANT USES OF SOME NUTRIENTS
Nutrient Main use in the body
Macronutrients
Carbohydrates - starches and sugars To provide energy needed to keep the body breathing and alive, for movement and warmth, and for growth and repair of tissues. Some starch and sugar is changed to body fat.
Carbohydrates - dietary fibre Fibre makes faeces soft and bulky and absorbs harmful chemicals, and so helps to keep the gut healthy. It slows digestion and absorption of nutrients in meals, and helps to prevent obesity.
Fats To provide a concentrated source of energy and the fatty acids needed for growth and health. Fat aids the absorp-tion of some vitamins such as vitamin A.
Proteins To build cells, body fluids, antibodies and other parts of the immune system. Sometimes proteins are used for energy.
Water To make fluids such as tears, sweat and urine, and to allow chemical processes to happen in the body.
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