with the development of economy and the improvement of living standards, more and more nutritious foods containing high levels of protein, fat and calories have been introduced to people's diet. many people are now enjoying a much better life, which is regarded as luxury by their grandparents. children are always pestering their parents to take them to the fast food restaurants such as mcdonlds and kfc. adults, on the other hand, like to have lots of meat and seafood. as a result, fat people can be seen everywhere.

　　some people think that being fat means good health. but this is not really the case according to research and experiments done in this field. in fact being too fat may cause such fat related diseases as heart attack, hypertension, etc. seeing that they are getting too fat, some people go on a diet that's too stringent or too lean in order to lose weight. consequently, they suffer from other diseases such as anemia and malnutrition.

　　obviously, the foods we eat have profound effects on our health. having too much rich food all the time is no good, nor is it much good to have too simple adiet. we shouldn't go to either extremes. if we want to keep fit, we should have a balanced diet. remember a well balanced diet plus proper exercises can keep us healthy and energized all the time.