Regular tea drinkers face an 11% lower risk of developing vascular disease compared to non-drinkers, according to a large-scale cohort study published in the Journal of Internal Medicine. The findings trace health outcomes across hundreds of thousands of participants over nearly a decade.
Cohort Study Tracks Nearly Half a Million Adults Across China
Researchers tracked 485,934 adult participants in China for a median of 9.05 years to examine the relationship between beverage habits and vascular health. During the follow-up window, investigators documented 14,863 total cases of cardiovascular disease, cerebrovascular disease, pulmonary heart disease, and peripheral artery disease. The data revealed that habitual tea consumption is linked with an 11% lower risk of experiencing these medical conditions.
Statistical modeling in the Journal of Internal Medicine study estimated that the lowest vascular risk occurs among individuals who consume approximately six to eight cups per day. Participants who drank tea on a weekly basis but fell short of this daily range still showed risk reductions, though the most pronounced inverse association appeared at the six-to-eight-cup threshold.
Black Tea and Moderate Brewing Strength Yield Strongest Outcomes
The type of leaf and the strength of the brew both influence vascular outcomes. Black tea showed more consistent inverse associations with vascular disease than green tea within the cohort. Preparation strength mattered: moderate-strength tea was associated with the lowest overall risk among the population studied.
Temperature proved to be a critical variable in the analysis. The research team noted that consuming tea at “burning hot” temperatures was associated with an elevated risk of vascular disease.
Lifestyle Combinations Amplify Vascular Protection
Tea drinking does not act in isolation. The study authors emphasized that lifestyle factors heavily influence cardiovascular and vascular health outcomes. Joint analyses demonstrated that tea consumption, smoking habits, and physical activity are collectively associated with vascular risk.
Specifically, the study authors wrote that “the favourable combination of habitual tea consumption, non-current smoking and high physical activity associated with the lowest risk.” Participants who maintained all three habits experienced the most substantial risk reduction recorded in the data set.
Common Questions About Tea Consumption and Vascular Health
How many cups of tea provide the lowest vascular disease risk?
Statistical estimates from the cohort study place the lowest risk at approximately six to eight cups per day among weekly drinkers.
Does green tea or black tea offer better protection against vascular disease?
The study found that black tea showed more consistent inverse associations with vascular disease than green tea.
Does tea temperature affect vascular health outcomes?
Yes. While regular consumption lowers risk, drinking tea when it is “burning hot” is associated with an elevated risk of vascular disease.
The 9.05-year median follow-up period adds to a growing body of epidemiological literature examining dietary habits and long-term vascular health across large populations.
Related reading