Where does pure Ceylon black tea come from? What are the benefits and side effects of drinking Ceylon black tea for a long time?

A cup of tea a day can keep you away from dementia, according to a recent study by assistant professor Feng Lei of psychological medicine at the National University of Singapore (NUS) Yong toilet Lin School of Medicine. A longitudinal study of 957 Chinese graduates over the age of 55 found that daily consumption of tea reduced the risk of cognitive decline in the elderly by 50%. Apolipoprotein E4 gene carriers with genetic susceptibility to Alzheimer's disease may experience a reduced risk of cognitive impairment by up to 86%. The team also found that the neuroprotective effect of tea on cognitive function is not limited to a particular type of tea-as long as the tea is brewed with tea, such as green tea, black tea or oolong tea. Although the study was conducted on elderly Chinese, the results also apply to other races. Our findings are of great significance for the prevention of dementia. Despite high-quality drug trials, effective drug treatments for neurocognitive disorders such as dementia are still elusive, and current prevention strategies are far from satisfactory. Tea is one of the most widely consumed drinks in the world. Our research data show that a simple and inexpensive lifestyle, such as drinking tea every day, can reduce a person's risk of developing neurocognitive impairment in old age, "Associate Professor Feng explained."

He added: "according to current knowledge, the long-term benefits of drinking tea are due to bioactive compounds in tea, such as catechins, theaflavins, theanine and theanine. These compounds show anti-inflammatory and antioxidant potential and other bioactive properties and may protect the brain from vascular damage and neurodegeneration. Our understanding of the detailed biological mechanisms is still very limited, so we need more research to find a clear answer. " In this study, we collected tea drinking data of elderly people living in the community from 2003 to 2005. Before 2010, standardized tools were used to assess the cognitive function of these elderly people every two years. Information on lifestyle, medical conditions, sports and social activities was also collected. These potential confounding factors are carefully controlled in the statistical model to ensure the robustness and validity of the research results. Assistant Professor Feng and his team are planning further research to better understand the effects of Asian diet on the cognitive health of the elderly. They are also keen to investigate the effects of bioactive compounds in tea and test them more rigorously by evaluating their biomarkers, conducting randomized controlled trials or studies (randomly assigning participants to experimental or control groups to eliminate biased results). According to United Nations statistics, in 2017, the global population aged 60 and over was about 962 million, accounting for 13% of the global population. In addition, the number of people aged 60 or above is growing at a rate of about 3% a year. The number of older persons in the world is expected to reach 1.4 billion in 2030, 2.1 billion in 2050 and 3.1 billion in 2100. As the global population is aging rapidly, and this does increase the incidence of dementia, tea can greatly reduce the risk of dementia in the elderly.