4 good reasons to drink tea daily

Researchers have recommended that people incorporate 2 to 4 cups of unsweetened tea into their daily diet, as a source of flavonoids, which are largely responsible for these beneficial effects.

Leading scientists in the field of research have recently met virtually at the Sixth International Scientific Symposium on Research and Human Health to discuss the current state of knowledge and the gaps in understanding the benefits. of tea. Researchers addressed a number of topics at the symposium, in particular the potential beneficial effects of cardiovascular health and cognitive function,

This is an analysis of the main results of research on its benefits

Types of tea and flavonoids

Tea is the second most consumed beverage in the world, after water. The four main types of tea are white tea, green tea, Oolong tea and black tea. These four teas come from the same plant, Camellia sinensis, but differ in the way they are treated after harvest. It contains a large volume of components that have a biological activity, especially flavonoids, L-theanine and caffeine. The good number of beneficial effects of the products are high levels of flavonoids, such as catechins, which have antioxidant and anti-inflammatory properties.

Differences in the manufacturing process can influence the chemical composition and beneficial effects of different types of products. For example, green tea is roasted before oxidizing and therefore contains higher levels of catechins. In contrast, black tea can oxidize and contain fewer catechins. On the other hand, black tea contains larger amounts of other flavonoids called theaububines and theaflavines, which also have antioxidant properties.

Cognitive function and cognitive decline

A number of observational studies suggest that tea consumption is associated with improvements in cognitive function. A few small tests are randomly monitored and have suggested energy consumption that could lead to improvements over time. The food jacket contains about 35-60 mg of caffeine, which can help increase attention and improve the humidity of some resentful people after consuming. Tea also contains theanine, which has been suggested to improve attention while reducing anxiety and stress. Researchers believe that the presence of theanine and caffeine can potentially produce a simultaneous sense of calm while improving attention. In addition, limited evidence suggests that the combined intake of theanine and caffeine may lead to a greater increase in attention that one or the other of the components taken separately.

The flavonoids present in tea can also have protective effects against the common cognitive decline associated with age and dementia. Several large long-term prospective cohort studies have recently explored the relationship between tea use and flavonoid use in tea and the results of dementia. The two main types of dementia are Alzheimer’s disease and vascular dementia. Flavonoids are components of tea that are thought to play an important role in preventing vascular disease.

Other studies have shown that higher consumption of tea, from a single cup and up to 5-6 cups a day, is associated with a reduced risk of dementia. Moderate consumption of flavonoids in ~ 2-4 cups of tea is associated with a reduction in the risk of dementia, and for both tea and its flavonoids, the maximum benefit can be obtained from moderate consumption of 2- 4 cups a day.

Cardiovascular benefits

A higher intake of dietary flavonoids is associated with a lower risk of cardiovascular disease and metabolic disorders, especially diabetes. According to a meta-analysis summarizing the data from 39 studies, daily consumption of each additional cup of tea was associated with a 2% decrease in the risk of cardiovascular event, a 4% decrease in the risk of stroke and a decrease 4% of the risk of death from cardiovascular disease. These positive effects of flavonoids on cardiometabolic health are associated with decreased inflammation and oxidative stress, better regulation of blood sugar and lipid levels, plus healthy intestinal microbiome, and protective effects on blood vessels. sangvini. Thus, the consumption of tea could be particularly beneficial for people whose diet is deficient in flavonoids, especially in whole grains, fruits and vegetables.

Tea and immune function

Drug use can improve immune health, studies suggest a potential role of truth in preventing bacterial and viral infections. For example, a number of human studies, including randomized controlled trials, suggest that drinking green tea may reduce the risk of influenza infection.

Immune system: two categories of benefits

The premiere is the protection effect against infection. Current research shows that catechins / teas can act directly on a variety of viruses and bacteria to prevent them from attaching and blocking their entry into host tissues, inhibiting replication and limiting their spread. Tea / tea catechins can also strengthen the anti-pathogenic response of the host’s immune cells to help fight pathogens and eliminate infection, ”he explained.

Second, the antioxidant and anti-inflammatory properties of green can also help prevent tissue damage caused by excessive inflammation and response to infection. Given its anti-inflammatory properties, it may also help alleviate the symptoms of autoimmune diseases, inflammatory bowel disease and rheumatoid arthritis.

In autoimmune disease it is a disturbed immune balance, and is characterized by the fact that the immune cells of a host attack its own tissues. Tea / tea catechins have been shown to modulate the complex function of immune cells to help correct this disorder, can be suppressed in the hyperactive response and promote tolerance. However, most of these results are based on cell cultures and animal studies, and other studies assessing the impact on human immune function are needed.

source

Beneficial properties of green tea catechins

Exploring the potential of black tea flavonoids against hyperlipidemia-related disorders

Tea Consumption: A Systematic Review of Randomized Controlled Studies Focusing on Human Knowledge, Mental Well-Being, and Brain Function

Dose-response relationship between tea consumption and the risk of cardiovascular disease and mortality from any cause: a systematic review and meta-analysis of population-based studies

Green Tea Catechin Influenza: A Systematic Review and Meta-Analysis

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