Can you drink the tea after it has cooled down?

　　Can you drink the tea after it has cooled down?

　　Experts say that after the tea is cooled, it contains a large amount of oxalate, which can form small stones and block the ureter, increasing the risk of kidney stones. In this regard, the Fourth Affiliated Hospital of Harbin Medical University Hospital Professor Gao Lin, an expert in urology, explained that about 80% of urethral stones are calcium oxalate crystals, and stone patients should drink less tea and more water.

　　For ordinary people, digestive juices will play a buffering role in the formation of stones, so the chance of stone formation after drinking cold tea is much smaller. However, tea is rich in oxalic acid. Just in case, you should pay special attention to the amount and method of drinking tea:

　　1. After the tea is cooled, it contains a large amount of oxalate, which will form small stones and is warm. blister Tea does not leach beneficial chemical components as fully as hot water. Therefore, it is best to make tea with water at 70℃-80℃ first, and then drink it when the temperature drops to about 60℃. Be sure not to exceed 70°C. Tea that is too hot will cause strong irritation to the throat, esophagus and stomach, and cause mucosal lesions. In addition, repeated brewing or brewing time is too long, the tea polyphenols, vitamins, and proteins in the tea will be oxidized and denatured, and harmful microorganisms will also increase.

　　2. Some people are used to heating water and continuing to drink the tea after it has cooled down. If no tea leaves are added during this process, the oxalic acid content in the tea will not change, so there is no need to worry. However, heating the water in the middle will not easily dissolve the nutrients in the tea, nor will it be easy to brew the fragrance.

　　3. Do not drink tea on an empty stomach, otherwise more oxalic acid will be absorbed into the body and the probability of forming stones will be higher. Especially for stone patients, you can drink water or lemon water to quench your thirst, because lemon contains a lot of sodium citrate, which can prevent kidney stones.

　　4. It is not advisable to drink too much tea every day. generally healthy Adults should drink 6-10 grams of tea a day and brew it in 2-3 times. People who do a lot of physical work, consume a lot of energy, eat a lot of greasy food, smoke and drink a lot, especially in high temperature environments, or who are exposed to a lot of toxic substances, it doesn't matter if they drink a little more every day.