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- Have you ever noticed that some people can eat what they
- want and stay in shape, while others carefully watch what
- they eat and still put on weight? How frustrating!
- However, scientists are beginning to believe that some
- people get the ability to stay thin from their parents.
- Scientists say that when some people eat, their bodies
- will naturally store the excess energy from food as fat.
- These people gain weight if they eat more than they need
- to each day. Meanwhile, other people eat more than they
- need to but their bodies are able to "burn off" the extra
- food without making fat, so they rarely have weight
- problems.
- To show that this is true, scientists have experimented on
- laboratory mice. They gave the mice a special diet with a
- lot of fat. Some mice gained weight while the other mice
- stayed thin, even though both groups of mice ate the same
- amount of food and got the same amount of exercise.
- Scientists concluded that weight gain seemed to be
- influenced by genetic factors. They also believe they have
- now identified the genes that may cause this tendency.
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- These genes, according to the scientists, get passed down
- the generations. Armed with this knowledge, they believe
- it may be possible to develop medicines that can target
- the genes and stop people from gaining weight.
- The study of weight gain is becoming more important as the
- number of people with weight problems continues to grow.
- In the United States, over fifty per cent of the
- population are now overweight. This means they are at risk
- of illnesses such as high blood pressure and heart
- disease.
- Current medicines for weight control do not work very well
- because they can have serious side effects, such as heart
- problems. However, it takes a long time to develop and
- thoroughly test new drugs. Therefore, despite this
- breakthrough in the study of weight-loss drugs, scientists
- and health professionals all agree that currently the best
- way to control weight gain is to have a healthy, balanced
- diet and an active lifestyle with daily exercise. This
- will not only help people avoid becoming overweight, but
- also help them stay healthy and energetic.
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