The relationship between the function of tea and cancer
However, it's not that simple. Although tea polyphenols are beneficial, tea may also contain small amounts of harmful substances, such as heavy metals. In addition, there are many types of tea, different teas have different functions, and if used well, it can protect us, and if used incorrectly, it may bring trouble.
For example, eating chocolate may make you fat, but it is not necessary to eat a piece of chocolate to become a big fat person. Depending on each person's physical condition, eating habits, lifestyle, etc., the reaction to tea will also be different.
In addition, the variety, quality, brewing method of tea, etc. The composition and content of different types of tea may vary. Good tea is of high quality and may contain fewer harmful substances; And inferior tea may have more problems.
The relationship between tea and cancer is complex and cannot be measured simply by a single number. It is necessary to comprehensively consider many factors such as various ingredients in tea, intake, frequency, and personal physical condition.
Middle-aged and elderly people should understand the basic characteristics of tea
Light fermented tea, fermentation degree of 5%~20%,
It is a semi-fermented tea, with a fermentation degree of 15%~70%.
It is a fully fermented tea with a fermentation degree of 70%~90%.
It is a post-fermented tea, and the degree of fermentation varies with time.
It is necessary to choose the right tea according to your own physical condition
If you have cardiovascular disease, high blood pressure, heart disease, cerebral thrombosis and other problems, it is recommended to choose tea that has the ability to lower blood pressure, reduce blood viscosity, and promote blood circulation, such as Pu'er, Da Hong Pao, etc., in addition
Lipid-lowering, anti-fatigue, nourishing and health effects, you should choose Da Hong Pao, it is a kind of oolong tea, especially suitable for middle-aged and elderly people. Substances such as tea polyphenols and theanine also have the effect of promoting metabolism and preventing obesity.
If you want to improve your immunity, you can choose goji berry tea. Goji berry tea can nourish qi and kidneys and enhance the body's resistance.
If the gastrointestinal function is normal and the middle-aged and elderly people have three high symptoms, green tea is also a good choice.
American ginseng tea is mostly cool, can reduce fire, has the effect of tonifying qi and calming the nerves and enhancing resistance, and is suitable for the elderly with low immunity.
Black tea can reduce the risk of fractures and is beneficial for bone health.
The main points that middle-aged and elderly people should follow when drinking tea
Pay attention to the amount and frequency of tea drinking: Generally speaking, the amount of tea used for each tea brew should be about 3-5 grams. Excessive tea consumption may lead to uncomfortable symptoms such as insomnia, heart palpitations, and stomach pain. Drink tea in moderation according to your physical condition and tea drinking habits. The amount of tea should not exceed 1000 ml per day, about 6 cups (150 ml cup).
Choose the right time and method: about 10 a.m. to 11 a.m., about 3 p.m. to 5 p.m., which is a more suitable time period for drinking tea, and try to avoid drinking tea at night so as not to affect sleep.
Remember not to drink tea on an empty stomach: Drinking tea on an empty stomach can easily irritate the gastric mucosa, resulting in stomach pain, stomach distension and other uncomfortable symptoms. Middle-aged and elderly people should avoid drinking tea on an empty stomach, and it is best to drink tea about an hour after eating.
Pay attention to the quality and origin of tea: choose tea leaves of good quality and reliable sources, and avoid drinking inferior tea leaves or tea leaves that are contaminated or moldy and spoiled.
Pay attention to the water temperature of tea: Generally speaking, green tea and oolong tea are suitable for brewing with a water temperature of about 80 °C, which can maintain the fresh taste and aroma of tea; Black tea and Pu-erh tea can be brewed with a water temperature of more than 90°C, which can better release the aroma and taste of the tea.
Tea making utensils should be clean: Tea making utensils such as teapots, tea cups, etc. should be kept clean. If there is tea dirt or peculiar smell on the utensils, it will affect the taste and quality of the tea. Therefore, it is important to wash your tea-making utensils regularly to ensure that they are clean and odor-free.
In short, middle-aged and elderly people should fully consider their own physical condition and health status when choosing tea varieties, and choose tea varieties that are suitable for them. At the same time, pay attention to drinking tea in moderation, avoid drinking tea on an empty stomach, and choose high-quality tea leaves to give full play to the health benefits of tea.
In short, middle-aged and older people should neither blindly believe in certain research results nor ignore the potential risks. While enjoying the deliciousness and health brought by tea, it is also necessary to maintain a sense of rationality and prudence.