There is no doubt that Morgan Spurlock's experiment is too extreme, because few people regard foreign fast food as the only food. Therefore, it has been pointed out that as long as it is not eaten every day or every day, it will not do much harm to the human body.
"This view is not correct!" Li Qingtian, director of China Nutrition Society, affirmed in an interview that foreign fast food is a typical "three highs" (high calorie, high fat and high protein), and such a diet structure is absolutely unreasonable in nutrition. "There are only a few kinds of foreign fast food, and we can analyze them in the same way." Li Qingtian explained in detail the classification of foreign fast food according to food types.
"The first killer is frying and baking food. Fried food such as French fries is the chief culprit of cardiovascular disease. Especially French fries, are high-fat foods. The original fat content of potato is less than 1%, but because of its high expansibility, the fat content after frying can reach about 40%. After food is fried at high temperature, it will produce carcinogens such as benzopyrene. Frying will also destroy vitamins in food and make protein denatured. However, grilled foods such as roasted chicken wings contain a lot of' tri-tetra-benzopyrene' (the first of the three carcinogens), which will lead to carbonization and degeneration of protein (increasing the burden on kidneys and liver). Some studies have said that 1 fried chicken leg is equal to the toxicity of 60 cigarettes. "
"White flour in hamburger base is refined food, and its key physiological function on human body is to generate heat. The history of human nutrition shows that people who overeat for a long time are prone to coronary heart disease, diabetes, arteriosclerosis and myocardial infarction. Because hamburgers contain a lot of cream, only one or two pieces of lettuce or pickles are sandwiched in the middle, so the fat content is high and the vitamin content is extremely low. "
"The problem of salt cannot be ignored." Li Qingtian pointed out that McDonald's was also blacklisted by the British Times because of its excessive salt content. The World Health Organization recommends that the daily salt intake of each person should not exceed 5g, and the nutrition experts in China suggest that it should not exceed10g. "If you eat too salty for a long time, it will not only induce cardiovascular and cerebrovascular diseases, but also cause gastritis, peptic ulcer and other diseases."
"carbonated drinks in foreign fast food can be regarded as accomplices." Li Qingtian added. Carbonated drinks such as cola contain phosphoric acid and carbonic acid, which will take away calcium from the body, and the sugar content is too high, there is gas and there is not much nutritional value. I feel full after drinking, which affects eating. This is why many children refuse to eat well. Frozen desserts such as cones contain sugar and cream, which is easy to lead to obesity. Too high sugar content will also affect dinner.
Professor Zhao Lin, a nutrition expert in the General Hospital of the Chinese People's Liberation Army, also pointed out that hamburgers and French fries can cause hormonal changes in the body, making consumers addicted and it is difficult to control their food intake. The study also found that hamburgers, French fries, potato chips, biscuits, roast pork, brown crispy skin on fruit desserts, biscuits, cakes and other foods contain a lot of acrylamide. As we all know, acrylamide is a natural by-product of foods rich in carbohydrates after high-temperature frying, baking or baking. Acrylamide can cause gene mutation, damage the central and peripheral nervous system, and induce benign or malignant tumors. Experts believe that this discovery explains the high incidence of tumors in western countries. According to the regulations of the World Health Organization (WHO), the acrylamide content per kilogram of food should not exceed 1 mg. However, at present, the acrylamide content in potato chips sold by McDonald's and KFC exceeds the standard by about 100 times, the acrylamide content in a package of ordinary potato chips exceeds the standard by about 500 times, and the acrylamide content in bread, cakes and biscuits also exceeds the standard.
Zhao Lin also pointed out that hydrogenated fats (shortening and margarine) commonly used in foreign fast food are even more harmful than saturated fats. He told reporters that Walter willett, the head of the Department of Nutrition at Harvard School of Public Health, published a paper at 199 1, clearly pointing out that hydrogenated fats used in foreign fast food are potentially harmful to human health. Fried food and baked food in foreign fast food generally contain hydrogenated fat. Willett said: "The controlled diet study on the influence of fat on blood cholesterol and the epidemiological study on the relationship between hydrogenated fat intake and the risk of heart disease and diabetes show that hydrogenated fat is worse than saturated fat."