New study highlights tea’s potential benefits for cardiovascular health
A recent study published in the Journal of Internal Medicine shows a connection between tea consumption and a lower risk of cardiovascular diseases, reports BritPanorama.
Over an average follow-up of approximately nine years, researchers identified more than 14,800 cases of cardiovascular diseases, including heart attacks, strokes, and peripheral artery disease among a sample of over 485,000 Chinese adults aged 30 to 79. Participants provided detailed accounts of their tea-drinking habits, encompassing frequency, preferred type, brewing strength, and drinking temperature.
The findings revealed that individuals who consumed tea at least three times per week experienced an estimated 11% reduction in cardiovascular disease risk compared to those who consumed it less frequently. This was after considering variables such as age, smoking habits, physical activity, body weight, and existing health conditions; notably, nonsmokers with elevated physical activity levels exhibited the most significant benefits.
Interestingly, moderate-strength tea was linked to lower overall risk, while black tea demonstrated a more consistent relationship with reduced risks across various cardiovascular conditions compared to green tea. However, those who reported drinking tea at “burning hot” temperatures faced a 16% increased risk of vascular diseases compared to those who preferred cooler temperatures. This raises questions about the impact of drinking temperature on health outcomes.
The research methodology had its limitations, as participants self-reported their drinking habits rather than having their consumption objectively measured. Therefore, individual definitions of “burning hot” may vary, and underlying lifestyle factors could influence cardiovascular health in ways not fully accounted for by researchers.
Dr. Leana Wen, a CNN wellness expert, noted that tea contains beneficial compounds known as polyphenols, particularly flavonoids, which possess antioxidant and anti-inflammatory properties. These compounds may help protect the endothelial cells lining blood vessels and improve arterial function, potentially lowering blood pressure and reducing heart strain.
Some studies have indicated that regular tea consumption correlates with improved blood pressure, cholesterol levels, and other cardiovascular health markers, explaining the observed lower rates of heart attacks and strokes among habitual tea drinkers. Furthermore, substituting sugary drinks with unsweetened tea can further enhance metabolic health and potentially decrease cardiovascular disease risk.
In discussions over tea types, Wen reiterated that both black and green teas are beneficial and can coexist in a heart-healthy diet, provided they’re consumed without added sugars. However, increased consumption beyond six to eight cups daily may raise risks, and findings should not be construed as a universal recommendation.
Advice for avid tea drinkers includes avoiding excessively hot beverages, as habitual consumption of such drinks has been associated with an elevated risk of esophageal cancer. Allowing tea to cool to a comfortable temperature may not only prevent burns but also help retain its cardiovascular benefits.
Individuals new to tea drinking need not feel pressured to start, given the myriad other methods available to mitigate cardiovascular risk, such as engaging in regular physical activity, maintaining healthy blood pressure and cholesterol levels, and adhering to a nutritious diet.
The dialogue on tea’s role in health continues, underlining the complexity and contextual considerations surrounding dietary habits and cardiovascular outcomes.
