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The article quoted the BBC report and introduced a recent nutrition study. In this study, scientists evaluated common foods and scored each one. The higher the score, the better the nutritional value. Fat pork, 73 points, ranked eighth, stand out from the crowd.
You can really find such a report on the BBC website.
Related reports (source: bbc.com)
The report mentioned that the higher the food score, the greater the possibility of meeting. What does this mean?
Screenshot of the article (original source: bbc.com)
The answer should be found in research.
The data listed in the BBC report comes from a study on 20 15. The researchers selected 1000 kinds of common foods and drew a special chart by querying the nutrition database of the US Department of Agriculture. [ 1]
Paper chart [1]
Each point represents a kind of food. The color of dots indicates the main attributes of food. If both foods contain some nutrients, connect them with short lines. For example, the lemon dot in the upper left corner represents pork fat, which is an oil-rich animal derivative and contains some nutrients together with nearby beef neck meat.
When a person says "this food is more nutritious than that one", he may mean that this food is easier to absorb, it contains more protein, or the amino acid combination of this food is more reasonable. In other words, "nutrition" has different standards. In this paper, researchers put forward the concept of nutritional fitness.
From the chart above, we can see that many foods are similar in nutrients. So, is there a food that covers all the nutrients needed by the human body? If there is, things will be convenient. As long as you eat it every day, you don't have to worry about malnutrition.
Unfortunately, no.
Then, the researchers tried two combinations, two of which were selected from 1000 foods to analyze their nutritional distribution.
The result is still not.
Finally, the researchers found that at least four kinds of food are needed to meet people's daily needs. There are many kinds of such combinations. Some of these foods appear frequently and are "universal oils", which are suitable for everyone, while others are the opposite. Only with a fixed "partner" can we provide comprehensive nutrition. Nutritional fitness indicates the frequency of food in all combinations. Fat pork is not only rich in fat, but also contains a certain amount of vitamins and minerals, which is quite versatile. So the frequency is high and the score is high.
Paper data [1]
In all fairness, this study has certain positive significance. On the one hand, it broke the legend of "magic food" again. There is no good food in absolute sense, and there is no bad food in absolute sense. Reasonable collocation is the key to a healthy diet. On the other hand, if your diet is particularly monotonous, eating a little almond (0.97 points), annona (0.96 points), sea bass (0.89 points) or pork fat (0.73 points) can make up for nutritional intake to some extent and avoid nutritional deficiency.
So, does it mean that pork can be eaten openly in the future?
Of course not.
With the continuous improvement of living standards, our food types are becoming more and more abundant. Compared with scarcity, we should be more alert to excess. The so-called surplus has two meanings. One is the total amount and the other is the proportion. The calories of fat are much higher than other foods, so eating too much pork can easily lead to obesity; Limited appetite. The higher the proportion of pork, the less other foods are eaten, and the more prone to nutritional imbalance. For example, insufficient dietary fiber intake.
The World Health Organization recommends that the energy provided by fat should not exceed 30%. [2] Some scholars surveyed teenagers in 9 provinces, and the results showed that 57% of the children exceeded the standard. [3] This is the data for 2009. Now, I'm afraid the problem is more serious.
Therefore, pork can be eaten, and the nutritional level depends on the collocation and what to eat together. Considering our per capita intake, it is more urgent to be wary of exceeding the standard than to worry about insufficient.
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refer to
[1]KIM S, SUNG J, FOO M et al. Revealing the nutritional status of food [J]. Proson, 20 15,10 (3): E 01kloc-0/8697.
[2] healthy diet [EB/OL]. World Health Organization, [20 18-07-09]. . The signed articles published on this website only represent the author's views and have nothing to do with this website. If there is any infringement, you are responsible.
Author: Zhao Yanchang