A new study suggests that drinking tea may help reduce the risk of heart attacks, strokes, 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 established CHD who were enrolled in 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 cardiovascular complications. The benefits were also stronger in people with lower levels of Lp(a), a genetic risk factor for heart disease. The researchers did not find evidence that Lp(a) itself explained tea’s benefits. Instead, the findings suggest that inflammation may determine who gains the most from drinking tea.
Type of Tea and Other Considerations
The study did not distinguish between different types of tea, so it is not possible to say whether one variety is better than another. However, green tea has strong research supporting its benefits for heart health. It is rich in catechins, including epigallocatechin gallate (EGCG), a compound linked to healthy cholesterol levels and reduced oxidative stress. Black, oolong, and herbal teas also contain beneficial plant compounds.
People who are not tea drinkers may still find heart health benefits from other beverages. A growing body of research suggests that moderate coffee consumption, also around three cups per day or 24 ounces, supports heart health.
For those who choose to drink caffeinated teas, such as green, black, or oolong, it is best to consume them earlier in the day to avoid disrupting sleep. Herbal teas are a good option for afternoons and evenings. The study adds to existing evidence that tea can be a healthy part of a daily routine, particularly for people managing heart disease.
