The weather is getting hotter and hotter, so maybe you're interested in a magical drink just like Tadpole's partner @WaHai:
Looking at this green juice, you can feel the coolness and relief of the summer heat, and it's so good that you can't drink it!
Green juice
However, the effect of green juice circulated on the Internet, can be more magical than cool summer:
First, rich in nutrients, rich in a variety of proteins and minerals;
Secondly, the chlorophyll, active enzymes, and other components, can purify the blood, the body of toxicity;
Secondly, the chlorophyll, active enzymes and other components, can be purified, the body of the discharge toxicity;
Third, it can regulate the body's pH.
Are these claims reliable?
Here we begin today's walk into science, to see what the green juice 'fairy water', is a ghost.
Nutrient supplementation is not much of an advantage
Green juice initially refers to the juice extracted from barley wakame (the young leaves of barley), and then also refers to the juice extracted from the young leaves of wheat, and now, the juice of many plants such as green tea, kale, and so on, can be called green juice.
As a beverage, there is no doubt that the main component of green juice is water. Apart from water, the composition of green juice is directly related to the ingredients chosen.
Shocked by the view, but not the efficacy?
Take the most common barley young leaves, wheat young leaves, for example, in 1996, the Fujian Provincial Academy of Agricultural Sciences, Rice and Wheat Research Institute, respectively, selected seedling, early spiking, early grouting, ripening stage of the min induced No. 3 barley nutritional measurements, the results show that the seedling stage of the barley amino acid content is the highest, and then, with the growth and development of the barley, the wheat plant contains a gradual decrease in amino acids, but the study did not horizontally compare the protein content of barley with that of other foods.1
In 2011, the Institute of Hygiene and Environmental Medicine of the Academy of Military Medical Sciences in Tianjin conducted a study of wheat seedlings, which had a protein content of 25.16 percent, a crude fiber content of 22.31 percent, and minerals, one kilogram of wheat seedlings, which contained 16,500 milligrams of potassium, 4,320 milligrams of calcium, and 44.2 milligrams of zinc.2
It makes me dizzy to see how to interpret these numbers.
The protein content of eggs is 12.6% and that of soybeans is 36.49%, which means that wheatgrass is superior to eggs and inferior to soybeans. Otherwise, it's about the same, with one kilogram of soybeans containing 17,970 milligrams of potassium, and 48.9 milligrams of zinc, which is more than wheatgrass; and from what I've been able to find out so far, it's only in terms of calcium that wheatgrass is slightly better.
? In short, nothing particularly magical.
The nutritional value of a food, in addition to its content, also takes into account the efficiency of absorption and utilization. Eggs and soy products are highly absorbed by the human body, and eggs have reached a staggering 92%.3 The data for green juice is not available, so it is doubtful for the time being; in order to pursue the taste, most of the green juice drinks are multi-filtered, and how much crude fiber can be left in them?
Crude fiber are filtered out
There is no basis for discharging toxins from the human body
Chlorophyll and hemoglobin in the human body, there are many similarities in the molecular structure. But that's not to say that when you drink green juice, chlorophyll goes directly into the bloodstream and takes over the function of hemoglobin.
Chlorophyll or, food in a variety of active enzymes, they are consumed, they have to pass through the digestive system first, through the gastrointestinal tract, a variety of digestive enzymes, decomposition into biological small molecules? The human body is absorbed by these small molecules, the metabolism needs, but also these small molecules.
Chlorophyll in the human body is mainly transformed into demagnesium chlorophyll, the human body on the demagnesium chlorophyll absorption rate is extremely low, less than 5% 4; and the active enzyme, in the gastrointestinal tract, they seem to be proteins, and other foods in the proteins are not much different, will be in the digestive juices under the action of amino acids.
As for the regulation of human pH, it is an old rumor
The human metabolism requires the participation of various organelles and proteins, and these structures and substances are sensitive to changes in pH. Therefore, human beings have evolved a set of mature and effective acid-base regulation system to maintain the stability of the internal environment.
In other words, if a person is healthy and has a normal diet, then, no matter what he eats, the pH of his blood will be between 7.35 and 7.45; if a person has a problem with the pH of his body fluids, such as acidosis, he would have already gone to the hospital to lie down, and it's useless to drink as much green juice as possible?
The more miraculous the rumors, the less you have to believe
Other "miraculous effects" of green juice, either the lack of solid experimental data, such as a paper in India in 2004, in the absence of a control group, claiming that patients with thalassemia in the case of consumption of green juice, the need for blood transfusion reduced by 5; or has long been a professional body refuted, such as the American Cancer Society's contention that there is currently no evidence that wheat seedling juice is beneficial.4
Why is Japan pushing green juice?
Dietary standards set by Japan's Ministry of Health, Labor and Welfare recommend that adults consume an average of 350g of vegetables per day. But for a variety of reasons, the 2001 National Health and Nutrition Survey reported that Japanese people's vegetable intake is significantly lower than 240g, especially among young people aged 20 to 29.6
In such a situation, drinking green juice may be able to make up for the shortfall in the daily diet and achieve a balanced nutritional effect.
On the contrary, if your daily diet is already well-balanced, then green juice is completely unnecessary and will not have any magical effect. Not to mention, it's not cheap.
Truth: You can drink green juice as a beverage if you want, but don't expect any magical effects.
?
References
1 Zhang Qiuying, Zhang Shaonan. Nutrition of wheatgrass [J]. Fujian Rice and Wheat Science and Technology, 1996, 14(3): 9-13.
2 Wang Yonghui, Li Peibing, Jin Hong, et al. Nutrient analysis of wheatgrass[J]. Journal of Nutrition,2011, 33(3): 327-328.
3 China Nutritionist Training Materials[M]. People's Health Publishing House, 2005.
4 Bian Huawei. Wheatgrass juice health lies[J]. Special Health,2015 (11): 80-81.
5Cloud without a heart, come untimely wheatgrass, Science Squirrel Society, 2013.
6Ministry of Health and Welfare. National Health - No Status - Heisei 20 Years MHLW National Health - Report Yori-[J].2011.
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Author: Zhao Yanchang