Regular Tea Drinking Linked to Lower Cardiovascular Risk

Steam curls from a porcelain cup, a small habit millions keep every morning. That routine may be doing more than warming hands. A large Chinese study suggests it could modestly lower the chance of developing cardiovascular disease.

What the researchers did and found

Scientists analyzed health records for 485,934 adults aged 30 to 79 and followed them for about nine years. During that time researchers documented 14,863 new cases of vascular disease, including coronary heart disease, cerebrovascular conditions, cardiopulmonary disease, and peripheral artery disease. Participants had reported their tea habits: how often they drank tea, the type they preferred, how strong they brewed it, and whether they sipped it piping hot or at a milder temperature.

The headline result: people who drank tea at least three days per week had about an 11 percent lower risk of developing cardiovascular disease than those who drank tea less frequently. The relationship was nuanced. Tea brewed to a moderate strength was associated with the lowest risk, while drinking tea at very high temperatures coincided with a higher risk. Black tea showed a more consistent association with reduced risk across several cardiovascular outcomes, though green tea also showed some benefit.

Not all tea drinking looked equal. Participants who reported consuming tea at very hot temperatures showed a roughly 16 percent higher risk compared with nonregular tea drinkers, whereas those who drank tea warm or at ordinary temperature tended to show reduced risk. Other studies have similarly linked very hot beverages to damage in the esophagus, underscoring that temperature matters.

How tea might influence the heart

Tea contains polyphenols, a class of natural compounds that includes flavonoids. These molecules have antioxidant and anti-inflammatory properties. In laboratory and clinical settings they can protect the endothelial cells that line blood vessels and improve arterial flexibility, which can lower blood pressure and reduce strain on the heart. Those biological effects provide a plausible mechanism for the epidemiological association seen in the study.

Still, the observational design cannot prove cause and effect. Tea drinkers in the study were more likely to be nonsmokers and to engage in physical activity — both powerful protectors against heart disease. The lowest risks were found in people who combined regular tea consumption with a smoke-free, active lifestyle.

No single beverage ensures heart health; overall lifestyle matters most.

So what should a reader take away? Sipping tea several times a week, brewed moderately and enjoyed warm rather than scalding, appears to be associated with modest cardiovascular benefits. But tea is only one part of a broader picture. Balanced diet, regular exercise, and avoiding tobacco remain the most effective strategies for reducing cardiovascular risk.

The study was published in the Journal of Internal Medicine and reported by major outlets. It adds an important, large-scale dataset to the conversation about dietary patterns and heart health, while reminding clinicians and the public that simple habits can have subtle but measurable effects over time.