茶是心头宝，谁喝谁知道 Tea is a treasure, who knows who drinks it
Tea is a treasure, who knows who drinks it
Is there any secret that drinking tea can bring health and longevity? Can coffee, soy milk and fruit juice not replace tea? What's in the tea? Are there any other drinks?
After reading this article, you can understand why tea has become our unique favorite.
1｜List of active ingredients in tea
In the fresh leaves of tea plants, the moisture accounts for 75%-80%, and the dry matter accounts for 22%-25%.
There are more than 700 kinds of chemical components in tea that have been separated and identified, and the types are really very rich. In addition, during processing, more ingredients are formed by reaction. The reason why we drink tea can have various delicate levels of bitterness, astringency, sweetness, and sweetness. The aroma includes floral, fruity, bean, tender, and honey, because the substances in the tea are too rich. Up.
The three components marked in green in the picture: tea polyphenols, alkaloids (mainly caffeine), and amino acids (mainly theanine) are the three most important components in tea, and they are also the most studied components of tea.
2｜What are the characteristic ingredients of tea?
Tea polyphenols, caffeine, and theanine are the "characteristic components" of tea and can be said to be the three treasures of tea.
Why are they "characteristic ingredients"? The following conditions need to be met.
First of all, these ingredients are unique to tea, there are few or few in other plants, and the content in tea is high.
Tea polyphenols, also called tea tannins, are the sum of a class of polyphenols that exist in tea species.
Although caffeine is called caffeine, there is more caffeine in tea than coffee.
Theanine is an amino acid unique to tea, which is extremely rare in other plants.
Secondly, it must be water-soluble, so that it can be dissolved in water after being brewed with water.
The third is that there is a physiological response to drinking, and different ingredients have different physiological responses.
3｜Three treasures in tea, irreplaceable
Tea polyphenols: antistaling agent for human body
The content of tea polyphenols in tea is as high as 18%-36%, which is the most important ingredient in tea. As we all know, the research on the antioxidant function of tea is all about tea polyphenols.
In short, free radicals can attack and damage the tissues and cells of the human body, leading to various consequences, such as aging, organ disease, skin deterioration, cancer and so on. Tea polyphenols scavenge free radicals and can be said to be a preservative for the human body. There is a famous anti-oxidant comparison experiment: 2 cups of green tea = 4 apples = 5 onions = 7 cups of orange juice.
Caffeine: refreshing and anti-fatigue
As mentioned above, the content of caffeine in tea is higher than that in coffee, but since it was first found in coffee, it had to be named after it, which is really wronged for tea.
Caffeine has the functions of refreshing, strengthening the heart, diuresis, and eliminating fatigue. Drinking tea feels very good, because caffeine works. In the past, people who drank tea paid much attention to the refreshing effect of tea. Especially some old farmers, even if it is thick tea, if there is no tea to drink, they will have no energy to work.
Theanine: a natural tranquilizer
There are 26 kinds of amino acids in tea, and theanine is the highest and most special amino acid among them, because theanine is hardly found in other plants and is unique to tea.
If caffeine is refreshing, then theanine is soothing. The two complement each other, so that the tea has a refreshing effect, but not overly excited. Theanine is known as the "natural tranquilizer" and it can make people concentrate. Professor Wang Yuefei from Zhejiang University mentioned that the effects of caffeine are produced in a short period of time, while the soothing and memory enhancement of theanine will only appear after a long period of accumulation.
Looking at these ingredients individually, each has its own advantages. They are all concentrated in a cup of tea and interact with each other to produce greater energy. From the perspective of international balanced nutrition, the composition of tea is the most reasonable. The coordination of nutrition and metabolism plays a good balance.
Tea is undoubtedly the greatest beverage in the world. Today, 900 billion cups of tea, 600 billion cups of coffee, and 100 billion cups of cola are consumed in the world in a year. Tea is the most consumed and popular beverage in the world except for water.
It is precisely because of this that tea is so good, it is our treasure...