Yin Junfeng told reporters that some people like to drink weak tea, while others like to drink strong tea. Although the times of tea brewing are closely related to different people's tastes, in terms of nutrient absorption, it is best to brew bagged tea only 1 time, and not more than 3 times in bulk Chaze.
He explained that tea contains tea polyphenols with anti-cancer effect, tea polysaccharides that can lower blood sugar, caffeine that excites the central nervous system, and various nutrients such as amino acids and vitamins. How much these nutrients can be separated out has a great relationship with the number of times of brewing. Generally speaking, the larger the shape particles of tea, the slower the speed of nutrient precipitation; The smaller the particles, the faster the precipitation rate.
Compared with bulk tea leaves, tea leaves in bagged tea leaves are fully destroyed by cutting and kneading during processing and manufacturing, and the particle shape is relatively small. After the first soaking for 3-5 minutes, 80%-90% of the nutrients in tea leaves will be precipitated, and after the second brewing, the remaining 10% of the nutrients will be almost completely precipitated. Therefore, Yin Junfeng suggested that it is best to brew bagged tea once, which not only has no loss in nutrient absorption, but also will not affect the taste and taste. Because the particles of bulk tea are relatively large, the first brewing time should be longer, which should be about 5 minutes, and 60%-80% of the nutrients will be precipitated; After the second brewing, 80%-90% of nutrients will be precipitated; After the third brewing, the leaching rate of nutrients will exceed 95%, and if it is brewed again, it will have no nutritional effect.
As for some experts, tea leaves will leach out harmful substances such as pesticides and heavy metals after repeated brewing. Yin Junfeng pointed out that although there is some truth in this statement, there is no need to worry too much. At present, most of the pesticides used in tea production in China have extremely low water solubility. According to the calculation of 1 0g of tea per person per day, even if1mg/kg of residual tea is brewed, the intake of pesticides is only 0.000 1 mg, which is one thousandth of the daily allowable intake stipulated by the World Health Organization. The leaching rate of heavy metal lead in tea is also relatively low. As long as you buy tea from regular manufacturers, its content will not exceed the national standard.
To sum up, Xinyang Maojian tea is generally better in 3 bubbles, and the time of each time depends on your own preferences.
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