A new study suggests that drinking tea may lower the risk of heart attack, stroke, and cardiovascular death in people who already have coronary heart disease (CHD). CHD is the most common type of heart disease in the United States, affecting about 1 in 20 adults.
Researchers analyzed data from more than 25,000 adults with CHD who were part of the UK Biobank. The participants were followed for an average of nearly 14 years. During that time, researchers tracked major adverse cardiovascular events, including heart attacks and strokes.
The study found that drinking about three cups of tea per day was linked to a 17% lower risk of heart attack, stroke, or death from cardiovascular causes, compared to drinking no tea. Drinking four or more cups daily still showed a benefit, but it did not provide additional protection beyond the three-cup mark.
The strongest protective effects were seen in people who had higher levels of inflammation at the start of the study. Tea is known for its anti-inflammatory properties, and inflammation is a known factor in heart disease complications. The benefits were also stronger in people with lower levels of Lp(a), a genetic risk factor for heart problems. The researchers did not find that Lp(a) itself explained the benefits of tea. Instead, the findings suggest that inflammation may play a key role in determining who benefits most.
The study did not specify which type of tea was consumed, so it is not possible to say if one variety is better than another. However, green tea has the strongest research behind it for heart health. It is rich in catechins, especially EGCG, a compound linked to healthy cholesterol levels and blood vessel function. Black, oolong, and herbal teas also contain beneficial compounds. People can mix different types of tea throughout the day to reach three cups.
For those who do not drink tea, moderate coffee consumption, also about three cups per day, has been linked to heart health benefits in other studies.
Tea contains polyphenols and other plant compounds that may help support healthy blood vessels and reduce oxidative stress. These factors play a role in how heart disease progresses. The researchers noted that if tea is already part of a daily routine, this study provides another reason to continue the habit. Caffeinated teas, such as green, black, and oolong, should be consumed earlier in the day to avoid disrupting sleep. Herbal teas are a good choice for afternoons and evenings.
Study Details
The study was published in Frontiers in Nutrition. It adds to a growing body of research on the health effects of tea. Previous studies have focused mostly on healthy adults, but this one looked specifically at people with existing heart disease. The findings suggest that regular tea consumption may be a simple and accessible way to support heart health in this group.
Heart disease remains a leading cause of death in the United States. According to the Centers for Disease Control and Prevention, about 1 in 20 adults have CHD. Lifestyle factors, including diet, play a major role in managing the condition. While tea is not a substitute for medical treatment, it may be a helpful addition to a heart-healthy routine.
