Fats
Fats play a significant role in our diet. They
are highly concentrated sources of energy and carry vitamins A, D, E and K. They also
perform a not unimportant function in making food more palatable. Ideally, fats should
account for only about 30 per cent of the diet although they frequently from up to 45 per
cent.
The chemical composition of fats and oils is identical.
We tend to think of fats as being hard and of animal origin, and oils as being liquid and
of vegetable origin. In general this is true, but there are exceptions like
vegetable-based hard margarines.
Most of the fats in our diet are made up of
triglycerides which are broken down by digestive enzymes in the intestine into glycerol
and fatty acids. Many of them are essential in maintaining the health of certain body
functions.
Fatty acids are made up of chains of carbon atoms, each
of which has four bonds. Two of these bonds are used to attach to the carbon atoms on
either side. The other two are usually attached to hydrogen atoms, but sometimes there is
a free bond which then forms a double bond between two carbon atoms. If all the spare
bonds are attached to hydrogen atoms, the fatty acid is described as 'saturated'; if there
is one double food bond between carbon atoms on the chain, the fatty acids is
'monounsaturated'; if there is more than one double bond, the fatty acid is
'polyunsaturated'.
All fats and oils contain all three types of fatty
acids. Animal fats tend to have a higher proportion of saturated fats, while vegetable
fats contain a higher proportion of polyunsaturated fats. Saturated fats have been shown
to raise blood cholesterol levels to a dangerous point. Polyunsaturated and in particular
monounsaturated fats seem to have the reverse effect, and are even considered by some to
undo the harm done by saturated fats.
Some fat facts
- Excess weight is the result of the body storing energy which
is not used. This can be caused by excessive calorie intake, insufficient energy
expenditure or inefficient, sluggish metabolism.
- Weight problems can lead to health problems. Overweight
people tend to develop diabetes, certain cancers and high blood pressure which often
result in strokes, heart failures, etc.
- To determine if you are overweight, try this simple test:
IDEAL WEIGHT (MALE) = (HEIGHT [CM] - 80) X 0.7 +/-
10%
IDEAL
WEIGHT (FEMALE) = (HEIGHT [CM] - 70) x 0.6 +/- 10%
- If you are 10% - 50% more than your ideal weight, you are
definitely overweight.
- If you are over 50% more, you are seriously overweight.
- When fatty deposits under the skin become excessive, it results in an
orange peel or cottage cheese appearance often referred to as cellulite.
- The number of fat cells in each person's body is fixed and cannot be
changed (except through surgery!). The number is determined during the growing years of
childhood.
- Slimming cannot reduce the number of fat cells. It can, however;
cause the size of the fat cells to shrink.
- Slimming happens when the fat droplet in fat cells is broken down.
Fatty acids are released and the fat cells shrink in size.
- Fat breakdown is triggered when the metabolic process in the fat cell
is turned on.
- Certain cell stimulants like cola extract have the ability to trigger
the breakdown of fat, provided these stimulants are delivered directly to the fat cells or
cellulite deposits.
- The accumulation of toxins in the gastrointestinal system affects the
entire body's metabolism and will result in weight problems. Common symptoms of toxicity
are tiredness, sluggishness, bad breath, water retention and excess fat in the body.
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