Since ancient times, people are accustomed to making tea in hot water, and it is believed that hot water can soak out the taste of tea and catechins and minerals that are beneficial to human body. In fact, the effect of tea with cold water is not bad at all. As long as you have enough patience, the fragrance and nutrition of tea will slowly seep from the inside. As a folk song of Xiangxi sang: "Cold tea slowly thickens..."
The so-called cold water tea, is to use cold water or mineral water to brew tea. Office workers, driving families, mountaineering people, etc., wherever they go, as long as you can buy mineral water, you can enjoy drinking and health care “cold tea†anytime, anywhere.
On the evening of the weekend, the reporter tried to make tea with cold water and compared it with hot tea. The reporter took out two identical glasses, put in 3 grams of Xinyang Maojian, and then put in 150 milliliters of water. Only one cup was red hot water and the other glass was normal-temperature mineral water. . The cup of tea that had just been poured into the hot water was immediately filled with tea and was full of bitterness. The cup of tea poured into the mineral water, close to the glass to smell a touch of tea, a mouthful, feeling just a little more than the mineral water tea flavor. After being placed for an hour, I had to drink a few more drinks. The taste of tea was thicker and bitter, but compared to hot tea, the taste of the tea was not strong but the tea remained in my mouth a few minutes later. Later, with mineral water refills the cup, the taste of the tea is a little lighter, but this cup of “cold tea†still tastes refreshed. Even more surprising to reporters, after several cups of “cold tea†came down, reporters did not sleep at night as usual, but they went to sleep.
How is this going? The next day, a reporter's access to information, consulting experts learned that caffeine in tea has a refreshing effect, which is why many people drink tea insomnia, and one of the benefits of cold water tea is that it can reduce the leaching of caffeine in tea. To prevent people from losing sleep.
Some people have experimented with brewing tea with water at different temperatures. The amount of caffeine leaching in tea has fallen as the temperature of the water falls. Among them, the leaching amount of caffeine in tea brewed with 100° C. water was about 1.35 times that of tea brewed with 4° C. water.
From this it can be seen that people who have the desire to drink tea but have concerns about the irritation of caffeine may wish to drink “cold tea†in addition to preventing insomnia and avoiding excessive coffee intake resulting in rapid heartbeat and calcium loss. Other side effects.
Although the amount of caffeine leaching is lower in cold tea, does it mean that the leaching of catechins and other beneficial ingredients will also fall? the answer is negative. Cold tea is slowly thicker, as long as you have enough patience, drinking "cold tea" can also drink good nutrition. Studies have shown that after 2 hours of cold water tea, the leaching amount of water-soluble components such as tannic acid and free catechin in tea is higher than that of hot-water foam tea, and that after 8 hours of cold-water tea is insoluble in water The leaching amount of components such as catechins can also reach about 70% of hot-water tea.
In addition, studies have found that tea contains a polysaccharide that both promotes islet function and removes too much sugar from the blood. However, this polysaccharide material is afraid of heat. If hot tea is used, it will be seriously damaged, and cold water tea will avoid this problem. From this point of view, drinking "cold tea" helps people to control blood sugar.
Although cold-water tea has many benefits, not every tea is suitable for soaking "cold tea." Experts pointed out that the longer the fermentation time, the higher the phosphorus content in the tea, and the cold tea should try to choose low-phosphorus tea with low phosphorus content. In terms of the most common tea products, the degree of green tea fermentation is relatively low, followed by oolong tea, and higher levels of fermentation are black tea, Tieguanyin, and Puer tea.
How to use cold water to make tea? details as follows:
1. Prepare tea, cold water, mineral water bottles, etc.
2. Brewing tea with cold boiled water, the ratio of cold boiled water to tea is about 50 ml to 1 gram, which can be increased or decreased according to personal taste.
3. After brewing for 1 to 3 hours, the tea can be poured out for drinking and the tea tastes sweet and delicious.
4. Unfinished tea can be poured into a water bottle, tighten the lid, and then put in the refrigerator, do not exceed 24 hours.
5. After taking cold tea from the refrigerator, try to finish it within two hours. (Wang Yaqing)
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