| Carbohydrates |
Carbohydrates
provide the body with its main source of energy. There are "simple
carbohydrates" - or sugars including glucose - and "complex" ones
- found in whole food like grains and vegetables and greens.
Excess glucose is stored ready for use in the body - but when
the body's reserves are full they are turned to and stored
as fat. |
| Cholesterol |
Cholesterol
is believed to affect the incidence of heart disease. Eating
too much fat or oil, particularly certain saturated fats can
raise blood cholesterol levels. Cholesterol can come from your
own body (made primarily by the liver) and dietary cholesterol
from the foods you eat. |
| Fat |
Fat
is how the body stores energy most efficiently. Fats are necessary
for metabolic functions including the maintenance of healthy
skin and hair. Too much fat is damaging to the body and your
health. There are different types of fats - see below - some
are worse than others. |
| Fat
reasonable limit |
According
to the Heart Foundation a reasonable total daily intact limit
is 90g of fat for the average man and 68g for the average woman.
Try to limit your fat intake to no more than 30% of your diet
- see the fat table below and the healthy eating pyramid. |
| Fats
- mono-unsaturated |
Found
in some foods including avocados, olives and peanuts and their
oils. They increase cholesterol levels and are high in kilojoules. |
| Fats
- polyunsaturated |
Found
mainly in vegetable foods and oils such as safflower, sunflower,
corn, soy bean and grape seeds. These can largely replace saturated
fats. |
| Fats
- saturated |
Found
mainly in animal foods such as dairy foods, egg yolks, meat
and offal, but also in some vegetables like palm oil and coconut
oils. |
| Macro-nutrients |
Are
necessary in large doses for the effective use of vitamins
and minerals. Macro-nutrients include oxygen, water, protein,
carbo-hydrates and fat. |
| Micro-nutrients |
Are
necessary in very small doses for the effective use of vitamins
and minerals. |
| Minerals |
Minerals
are inorganic (or non-carbon) natural substances . There are
major minerals (where the body requires more than 100mg/day
like calcium and potassium and phosphorous) and minor minerals
(like iron zinc and manganese). They are essential to the body's
functions. |
| Niacin |
Also
known as vitamin B3. It is essential for the release of energy
from food, normal growth, blood cell formation and protects
against cancer. A good source is poultry, fish, beans, peas,
yeast, whole grain products and beef. |
| Oxygen |
Oxygen
is necessary for the burning of energy in our body's cells. |
| Protein |
Proteins
is important in the body's growth and repair, our muscles and
organs, antibodies and some hormones are made up of protein. |
| Recommended
dietary intake (RDI) |
RDI
are used as a basis for daily dietary planning. They are a
set of standard food intake guidelines established by food
nutritionists and scientists. See below table. |
| Vitamins |
Vitamins
are necessary in small amounts for sustaining life. Vitamins
are organic (contain carbon and come from living or once living
things) and are found in food. |
| Water |
Water
makes up over 60% of our body weight and is essential in our
bodies biochemical reactions and carrying of chemicals within
the body. |
| Sodium |
Often
just thought of as salt, although salt is made up of sodium
and chloride. So salt is only one source of sodium. Sodium
is also
found in baking sodium and baking powder, milk, meats and some
vegetables. Sodium is essential in nearly every body function
including water balance and muscle contraction. High sodium
intake is linked to high blood pressure. Whilst salt is essential,
you should not have too much. A recommended daily intake is
2,400 mg. |