Professor willett believes that the "old-fashioned" pyramid is unreasonable for the proportion of meat in the whole diet structure, because eating too much meat, especially "red meat" (pigs, cattle and mutton), will lead to an increase in cholesterol and blood pressure. At the same time, vegetable oil and nuts that are not included in the pyramid will not only cause obesity, but also benefit human health.
In view of these loopholes and fallacies, Professor willett rebuilt a pyramid. This pyramid is divided into seven layers, the top layer is dessert and butter, followed by: dairy products, fish or a small amount of red meat, nuts and beans, vegetables and fruits, whole wheat food and vegetable oil, and the bottom layer has nothing to do with food-long-term, appropriate physical exercise.
Analyze the pyramid layer by layer
First floor: butter and dessert
Both the old pyramid and the latest pyramid proposed by Professor willett put butter and dessert at the top. It can be seen that this kind of food has almost no other function except increasing calories and fat, let alone being healthy. If you want to keep a beautiful figure, you'd better stay away from the food on this floor; But if you need to do a lot of physical exercise, such as long-distance running and swimming, you can eat a piece of chocolate before exercise to supplement your physical strength and calories.
The second layer: dairy products
In the old pyramid, dairy products and meat are on the second floor. Professor willett put dairy products on the second floor alone, because eating too many dairy products will increase the burden on the heart and lead to higher cholesterol, and its side effects are greater than meat. Some people emphasize that dairy products can increase calcium in the body. In fact, dairy products are not the only or best way to get calcium. Experiments show that the calcium provided by two cups of milk is only equivalent to the calcium supplemented by several mouthfuls of tofu. Of course, you don't have to change the habit of drinking milk every day, but it is more reasonable to drink skim milk as much as possible.
The third layer: fish or a little red meat.
The meat quality of seafood is called "white meat" These meats are rich in protein and various amino acids, which will not be converted into fat, and can be properly ingested 2 ~ 4 times a week. Excessive intake of other "red meat" foods will lead to an increase in the incidence of cardiovascular diseases, especially animal viscera. It is best not to eat it often. Even for young people, too high cholesterol index will lay a curse for the future.
Layer 4: Nuts and beans
This kind of food was ignored in the old pyramid, and Professor willett just thought it was very important. Many people think that nuts can cause fat accumulation. In fact, the oil in nuts belongs to vegetable oil, which is cleaner than the oil in animals and contains more vitamins and other nutrients. Bean products contain a variety of trace elements, especially calcium, which is very beneficial to osteoporosis patients and the elderly.
The fifth floor: vegetables and fruits
The importance of vegetables and fruits to human health need not be overemphasized. We should eat these two most beneficial foods as much as possible when the stomach allows.
Layer 6: Whole wheat food and vegetable oil
In the old pyramid, vegetable oil was not included in the edible range. In real life, vegetable oil is an indispensable ingredient in the cooking process. At the same time, the calories of vegetable oil are not as high as expected. On the contrary, the trace elements contained in it can provide the substances needed by the body, which should be said that the advantages outweigh the disadvantages.
The seventh layer: long-term appropriate physical exercise.
Professor willett unexpectedly listed physical exercise as the "foundation" of the pyramid. He believes that a perfect diet should be based on a healthy lifestyle. Life lies in exercise. Only by combining exercise with scientific diet can we keep our body in the best condition.