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Is it true that Alzheimer's disease is related to tea drinking?
As a disease that seriously threatens health and quality of life, Alzheimer's disease can be regarded as a "killer of old age", especially in the mainland, the number of Alzheimer's disease is increasing year by year, and today, it is the country with the largest number of Alzheimer's patients in the world.
In order to find out the cause and pathogenesis, experts have conducted many discussions, and the Lancet International Commission on Dementia Prevention, Intervention and Care has announced that the prevention of Alzheimer's disease is most effective through lifestyle management, and one-third of the world's Alzheimer's disease is caused by lifestyle errors.
There is also a saying that the more tea the elderly drink, the greater the possibility of dementia!
Is this really true, though? Tea should often appear in many people's families, for Chinese people, drinking tea in their free time is enjoyment, does this kind of comfortable thing really damage their health?
Alzheimer's disease is the fault of drinking tea, is it credible? Let's see what the results of the study have to say
In 2022, in order to understand the relationship between "Alzheimer's" and "tea drinking", Professor Yu's team at Fudan University published its research results in Translational Psychiatry, a sub-journal of Nature.
Through a large-scale prospective cohort study of more than 370,000 participants over a period of 9 years, the research team found that:
There was a U-shaped association between the amount of tea consumed (including black and green tea) and the risk of dementia, with a cut-off of 3 cups. Drinking 1-2 cups of tea per day will reduce the prevalence of dementia by 17.7%; 3-4 cups of 20.8% reduction in risk is the most significant; The effect of continuing to increase the amount of tea drunk has decreased, 5-6 cups/day, a decrease of 19.7%, and if it is more, it may be no different from those who do not drink tea.
However, researchers from the Seventh Affiliated Hospital of Sun Yat-sen University said that drinking too much tea may increase the risk of dementia.
Through two-sample Mendelian randomization analysis, the researchers found that drinking too much tea may affect the volume of gray matter and the volume of the right hippocampus, so that the protective effect of tea disappears; If you drink more than 13 cups of tea a day, the prevalence of dementia may increase by 67% compared to those who do not drink tea!
It can be seen that the amount of tea drunk is very important, which also reflects from the side that Alzheimer's disease is not entirely caused by drinking tea, or it can be said that it has little to do with tea drinking itself, mainly because tea drinkers do not control the amount of drinking.
As you get older, what do you need to pay attention to when drinking tea? Do a good job of 5 points, drinking tea is healthier
Tea contains theophylline, caffeine, tannic acid and other substances, which have certain benefits for refreshing the mind, but if the elderly drink it, they must pay attention to the following points:
1. Don't drink too much tea
Tea is rich in a large amount of theophylline, caffeine, these two stimulants into the human body will stimulate the nervous system, so that the heart beats faster, blood circulation is rapid, resulting in increased blood pressure, the elderly themselves blood vessels are fragile, heart function is poor, suddenly rapid heartbeat, blood pressure rises, will lead to chest tightness palpitations and other uncomfortable symptoms, the elderly with cardiovascular disease must drink less.
For the rest of the population, the doctor suggests: after getting older, drink no more than 1000ml of tea every day, and when brewing, the ratio of tea to water is controlled at about 1:50, and it is best to brew 3-4 times.
2. Don't drink strong tea
After the tannic acid in the tea enters the stomach and intestines, it will react with the iron in the food to form ferric tannins precipitation, which is extremely difficult to decompose, and will also hinder the body's absorption of iron.
In addition, strong tea will dilute gastric juice, reduce the concentration of gastric juice, affect digestive function, and are prone to indigestion, bloating and other symptoms.
3. Don't drink tea before going to bed
With the increase of age, the elderly may have different degrees of sleep disorders, if coupled with the refreshing and diuretic effect of the tea itself, it is likely to have difficulty falling asleep, or frequent waking up at night, affecting the quality of sleep. Therefore, the elderly should try not to drink tea within two hours before bedtime, and can drink a small amount of water to quench their thirst.
4. Do not drink tea during the period of drinking
Old age is a frequent stage of chronic diseases, many elderly people have more or less some chronic diseases, daily also need drug control, and tea tannin and theophylline, can have a chemical reaction with some drugs, especially the drug has iron supplementation, sedation, drunken sleep and other effects, combined with the drug effect will be greatly reduced, is not conducive to the recovery of the elderly and the stability of the condition.
5. Don't drink tea after meals
Tea should not be drunk within 20 minutes after eating, at this time, the blood circulation in the stomach is too fast, and gastric juice will be secreted to promote food digestion, and after drinking tea, the concentration of gastric juice will be affected by tannic acid, which is an alkaline substance that will inhibit gastric acid secretion, thereby affecting food digestion.
Dig deeper: Why do you like to drink this tea so much? What are the effects of drinking tea on the body?
In fact, why does everyone like to drink tea?
On the one hand, the taste of tea is better than that of boiled water; On the other hand, drinking tea is a relaxing process for many people, and everyone enjoys the atmosphere of cooking and drinking tea; In addition, when we control the amount of tea we drink and avoid the above-mentioned taboos of tea drinking, the elderly often drink tea is actually a lot of benefits, let's learn more about it.
1. Drinking tea scientifically may have certain benefits for the prevention of osteoporosis
Osteoporosis is a metabolic disease, closely related to the aging of the body, clinically manifested as low bone density, bone microstructure damage, etc., in the mainland, the incidence of osteoporosis in the elderly is very high, reaching 36% over 60 years old. After the elderly suffer from osteoporosis, they may have bone and joint pain, which causes pain all over the body, and daily walking or standing will be uncomfortable, which seriously affects life.
In addition, osteoporosis will also increase the risk of fractures, especially in the elderly, with the increase of age, the amount of exercise decreases, the loss of calcium in the bones, it is easy to fracture under the action of simple external force, affecting the health of the body.
Finally, osteoporosis is manifested as bone deformation and vertebrae wedge-shaped changes, which is why the elderly usually have rickets and can't straighten their arms and legs, which affects their physical health, and in the long run, it is easy to increase the burden on the spine, affect cardiopulmonary function, and cause symptoms such as poor breathing, chest tightness and shortness of breath.
Regarding the fact that drinking tea can reduce the risk of osteoporosis, MedSci published a related study in 2023, by recruiting 42,742 middle-aged and elderly participants aged 45-74 to conduct an 8-year follow-up survey on dietary habits, analyzing and comparing their tea drinking habits, and concluding that drinking tea can reduce the risk of osteoporosis to a certain extent, but drinking too much tea may also increase the risk of hip fracture.
But why are these effects?
The fluorine element in tea is closely related to bone metabolism, and when it meets the needs of the human body, it will interact with calcium and phosphorus in the body, promote the attachment and deposition of these substances in various bones, strengthen the strength and hardness of bones, and have a certain effect on preventing osteoporosis. In addition, some components in tea, such as tea polyphenols, tea pigments, and tea polysaccharides, can promote the formation of new bones.
In short, drinking tea scientifically is indeed beneficial, but I would like to emphasize that those who have symptoms of osteoporosis should seek medical attention as soon as possible, and do not hope for tea!
2. Drinking tea scientifically can help delay aging to a certain extent
Regarding the fact that tea can delay aging, there is a study in the Lancet sub-journal that compares the different tea drinking amounts in 13929 by group, calculates the difference in their biological age, and further analyzes the relationship between tea drinking and biological aging.
After 4.5 years of follow-up survey, it was concluded that the participants who did not drink tea to drink tea were slower than those who never drank tea, and the participants who drank tea from tea to no tea aged faster than those who were used to drinking tea.
After conducting a detailed survey based on the daily tea consumption of participants who are accustomed to drinking tea, the researchers found that drinking 3-6 cups a day and consuming about 8g of tea leaves had the best anti-aging effect.
The reason why drinking tea will affect aging is that tea contains many bioactive compounds, such as polyphenols, purine alkaloids, theanine, etc., when we ingest tea, these substances will react with the body, and the antioxidant, anti-inflammatory and immunomodulatory mechanisms will act on the body, thereby inhibiting cell oxidation, resisting organ inflammation, regulating the immune system, enhancing immunity, ensuring the health and youth of the body, and having a certain positive effect on aging.
In addition, different types of tea also have differences in efficacy, such as green tea is more irritating to the stomach and intestines, and is not suitable for long-term drinking by the elderly; White tea has the effect of relieving tension and protecting the eyes; Yellow tea, on the other hand, has the effect of increasing appetite and promoting digestion, and is more suitable for the elderly to drink.
In general, there are pros and cons for the elderly to drink tea, and the daily control of drinking amount, choosing the right tea, and controlling the time of drinking tea, can maximize the benefits of tea!
Bibliography:
1. Ouyang Yanling, Yin Shangjing. Research on the epidemic status and prevention strategies of Alzheimer's disease in mainland China[J].China Soft Science,2019,(6):50-58.)
2.JPD: A study of 500,000 people in China: what is the risk of long-term Parkinson's disease in people who love smoking and drinking tea?2022-05-14.
3. Osteoporos Int: Can drinking tea really reduce the risk of osteoporosis? 2023-04-19.
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