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In the marketing of various health care products and "magic food", we often see such publicity: "
XX
is the essential nutrients of the human body, what important function, lack of it will lead to symptoms one, two, three, four ... A certain food is rich in
XX
, so can effectively prevent and control symptoms one, two, three, four..." It would be even more
to
a scientist who won the Nobel Prize for his discovery of the physiological function of the XX component., which is full of scientific terminology, is hugely appealing to many consumers. However, the logic of this argument is a complete gimmick.first of all, the human body needs a substance, a substance is important to the human body, the lack of a substance will lead to certain symptoms, and the human body needs to supplement this substance is completely different. The physiological activities of the human body are composed of a variety of bio-chemical reactions, which require the participation of various enzymes, as well as a variety of small molecular substances as messengers of signaling. They are of course important for human health, because lack of them will lead to certain physiological activities can not be carried out, and may be a variety of symptoms. However, many substances need to be synthesized by the human body itself, and the human body will regulate its own synthesis. Supplemented by food, digested and absorbed, completely non-physiologically active, it is meaningless. Various enzymes - the fashionable name is "enzyme", not so., the lack of a substance can cause symptoms, and supplementing it can prevent and control the symptoms is also different. In general, most symptoms in the body have more than one trigger. Lack of a nutrient can lead to it, but as long as the intake reaches "sufficient amount", there is no additional "prevention effect" of additional supplements. This is true of vitamins and minerals, and if the body is deficient, supplementing it will naturally be "effective". But if it's not, there's no value in adding extra - even if it's too much, it can be risky. All of these vitamins and minerals have "adequate intake" and "maximum intake" indicators. The former is the amount that should be consumed from various ways, while the latter is the amount that the various ways add up not to exceed., even for those who need nutrients from food, the body needs "total intake" rather than "concentration". The total amount is determined by multiplying the amount of food consumed by the concentration of the ingredient in it - even if it is high in a food, the amount is limited if the amount consumed is small. A typical example is spirulina. The protein quality in spirulina is good, the concentration is not low, but as a health care product spirulina, the general daily consumption of only a few grams, the protein provides less - compared to the human body needs dozens of grams of protein a day, spirulina in that point can be completely ignored. For example, "selenium-rich tea", the content of selenium in tea is not low, but considering the daily use of tea, as well as the dissolution rate of selenium in tea, it can contribute selenium relative to human needs can only be described as "chat is better than nothing". In fact, a variety
"
XX high nutritional content" and hyped out of the magic health products, are basically similar situations.addition, there are some ingredients that are not necessary for the human body, but marketing often claims that "scientific research shows that there is a certain role." Most of these studies are just cellular or animal tests. Cell testing can provide some direction for research, but it may be completely different from the condition in the body. Moreover, it could not draw the conclusion of "how much to eat to be effective". Animal testing is worth more than cell testing, but it's still a long way off. What's more, these tests are often just to explore the action of the system, to apply to the human body, "need to be further tested in the human body." However, after the publication of such research, after many years there is no "then" - "still need" too long, often not no one to do, but the results of human trials are not satisfactory, funders do not want to publish, it has to be "needed" to go on. Or some experiments have found that the amount of "effective" needs is too large to be realistic at all. For example, resveratrol in wine, cell test results are good, but to be effective for people, you have to drink wine until you put yourself to death. This is the case with the efficacy of many "plant chemicals".