Some people always judge the nutritional value of some foods according to their traditional knowledge. In fact, with the development of modern science, many foods have lost their internal nature. For example, people can not regard fried fish filets as a kind of nutritional food just according to the nutrients contained in fish. Some foods only seem healthy. 

Fried fish filets are usually made of cod. Cod contains abundant unsaturated fatty acid which is beneficial to the human health. Therefore, people think fried fish filets are also beneficial to the health of the human body. But people can not ignore many other kinds of furnishes of fried fish filets. The complex procedures of production have seriously decreased the nutritional value. A large amount of salt, gourmet powder and saturated fat can endanger the human health. Therefore, people can buy the live fish to cook by themselves and avoid eating the processed fish.

Many people like to drink green tea, as green tea contains abundant anti-oxidants and other beneficial compositions. Green tea can help people prevent cancer, heart diseases, the aging and some other diseases. Nowadays, people like to buy the beverage of green tea. In fact, sugar and other food additives added into the beverage by the manufacturers have destroyed the nutrients and reduced the nutritional value.

Generally speaking, yogurt is made of fresh milk and it contains protein, calcium and vitamins. More and more people like to drink yogurt in everyday life. However, nowadays, yogurt has been transformed into a kind of “dessert” filled with sugar and processed fruits. The value of the nutrients contained in yogurt has been reduced. Therefore, people should buy the fat-free yogurt in order to keep healthy.

It is known to all that soup can improve the physical conditions for the human body and the price of it is relatively low. In recent years, canned soup is rather popular among people. In fact, canned soup is not healthy at all. It contains salt, fat, artificial food additives, antiseptics and some dehydrated carrots. In addition, one can of soup contains about 1000 milligrams of sodium, but people need nearly 2000 milligrams of sodium each day. Therefore, it is better for people to cook soup at home.

In short, people can not judge the nutritional value of some foods just according to their names or their raw materials. The additives, furnishes and the processing procedures have already seriously decreased the nutritional value.