A new study suggests that drinking tea may help lower the risk of heart attack, stroke, and cardiovascular death in people who already have coronary heart disease (CHD). CHD is the most common form 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 part of the UK Biobank. Participants were followed for an average of nearly 14 years. During that time, researchers tracked major adverse cardiovascular events, including heart attack and stroke.
The study found that drinking about three cups of tea per day was linked to a 17% lower risk of these events compared to drinking no tea. Drinking four or more cups daily still showed a benefit, but it did not provide extra 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-related complications. The benefits were also stronger in people with lower levels of Lp(a), a genetic risk factor for cardiovascular disease.
The study did not specify which type of tea was most beneficial. Green tea has strong research backing for heart health, as it is rich in catechins, including EGCG, which have been linked to healthy cholesterol levels and reduced oxidative stress. Black, oolong, and herbal teas also contain beneficial compounds.
For people who do not drink tea, research suggests that moderate coffee consumption, also around three cups per day, may support heart health. Caffeinated teas like green, black, and oolong should be consumed earlier in the day to avoid disrupting sleep. Herbal teas are a good option for afternoons and evenings.
