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Nutrient Groups
The nutrients found in food can be divided into groups: CARBOHYDRATES,
FATS, PROTEINS, MINERALS, VITAMINS. In addition to these groups of nutrients
the body cannot function properly without WATER and DIETARY FIBRE.
All of these substances perform one or more of the following duties in
their care of the body.
- Provide energy or fuel for the body.
- Promote growth and repair wear and tear.
- Regulate the body's various functions.
Carbohydrates
This nutrient group provides the body with about 40-50% of its energy
or fuel requirements. The main source of carbohydrates are sugars and
starches such as cereals, bread, pasta, potatoes and other vegetables
and fruits.
Interestingly enough carbohydrates used to be a much maligned group of
foods. They were considered the slimmer's enemy "No potatoes
for me, I'm on a diet!". Modern nutrition has recognised this attitude
as one of the most common food fallacies.
Unrefined carbohydrates are also a vital source of dietary fibre.
It is the refined carbohydrates (sugar or white flour, for example) that
are the dieter's enemy, not to mention the added fats that are wished
on the unsuspecting potato in the form of frying oil or lashings of butter.
Fats
Oils, butter and animal fats are the body's most potent sources of energy
just a little goes a long way! On a weight basis, fats have more
than twice as many kilojoules as carbohydrates or protein.
The words "saturated" and "unsaturated" are much
bandied around these days. Fairly recent nutritional research has classified
the various types of fats by their chemical structure. Saturated fats
are mostly found in animal products (meat and dairy products) while unsaturated
fats come mainly from plants (e.g. safflower oil). It has been medically
proven that saturated fats raise the level of blood cholesterol which
increases the risk of heart disease.
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