Drinking tea at the least three times per week is linked with an extended and healthier life, based on research published today found in the European Journal of Preventive Cardiology, a new journal of the European Modern society of Cardiology (ESC).
“Habitual tea consumption is connected with lower risks of heart problems and all-cause death,” said first author Dr. Xinyan Wang, Chinese Academy of Medical Sciences, Beijing, China. “The favourable health effects would be the most robust for green tea extract and for long-term habitual tea drinkers.”
The analysis included 100,902 participants of the China-PAR project2 without any past history of coronary arrest, stroke, or cancer. Participants were classified into two groups: habitual tea drinkers (three or maybe more times weekly) rather than or non-habitual tea drinkers (significantly less than three times per week) and followed-up for a median of 7.three years.
Habitual tea consumption was related to healthier years of life and longer endurance.
For example, the analyses estimated that 50-year-old habitual tea drinkers would develop cardiovascular disease and stroke 1.41 years later and live 1.26 years than those who never or seldom drank tea longer.
Compared with or non-habitual tea drinkers never, habitual tea consumers had a 20% lower threat of incident cardiovascular disease and stroke, 22% lower danger of fatal heart stroke and disease, and 15% decreased threat of all-cause death.
The potential influence of changes in tea drinking behaviour were analysed in a subset of 14,081 participants with assessments at two time points. The typical duration involving the two surveys was 8.a couple of years, and the median follow-up following the second survey was 5.36 months.
Habitual tea drinkers who maintained their habit in both surveys had a 39% lower danger of incident cardiovascular disease and stroke, 56% lower threat of fatal cardiovascular disease and stroke, and 29% decreased danger of all-cause death in comparison to consistent never or non-habitual tea drinkers.
Senior author Dr. Dongfeng Gu, Chinese Academy of Medical Sciences, said: “The protective aftereffects of tea were most pronounced one of the consistent habitual tea drinking group. Mechanism studies have suggested that the key bioactive compounds in tea, polyphenols namely, aren’t stored in the physical body long-term. Thus, frequent tea intake over a long period may be required for the cardioprotective effect.”
In a subanalysis by form of tea, drinking green tea extract was related to approximately 25% lower risks for incident cardiovascular disease and stroke, fatal cardiovascular disease and stroke, and all-cause death. However, no significant associations were observed for black tea.
Dr. Gu noted a preference for green tea extract is exclusive to East Asia. “Within our study population, 49% of habitual tea drinkers consumed green tea extract most often, while only 8% preferred black tea. The little proportion of habitual black tea drinkers could make it more difficult to see or watch robust associations, but our findings hint at a differential effect between tea types.”
Two factors could be at play. First, green tea extract is a rich supply of polyphenols which force away cardiovascular disease and its particular risk factors including raised blood pressure and dyslipidaemia. Black tea is fully fermented and with this process polyphenols are oxidised into pigments and might lose their antioxidant effects. Second, black tea is served with milk, which previous research indicates may counteract the favourable health ramifications of tea on vascular function.
Gender-specific analyses showed that the protective aftereffects of habitual tea consumption were pronounced and robust across different outcomes for men, but only modest for women. Dr. Wang said: “One reason may be that 48% of men were habitual tea consumers when compared with just 20% of women. Secondly, women had reduced incidence of, and mortality from, heart stroke and disease. These differences caused it to be prone to find significant results among men statistically.”
She added: “The China-PAR project is ongoing, with more person-years of follow-up among women the associations might are more pronounced.”
The authors figured randomised trials are warranted to ensure the findings and supply evidence for dietary guidelines and lifestyle recommendations.