Can green tea lower blood pressure?

Studies show that green tea can slightly reduce blood pressure due to the antioxidants it contains, but excessive use may cause some side effects.

Green tea is a popular drink containing plant-based compounds associated with improved heart health. Research indicates that it can lower blood pressure. However, when consumed in excess, problems such as caffeine-related side effects or reduced iron absorption by the body may occur. 

The effect of green tea on blood pressure

Blood pressure is the pressure exerted by blood on the walls of blood vessels. If this pressure remains high for a long time, it can damage organs and increase the risk of cardiovascular diseases, stroke, and other complications. One of the causes of high blood pressure (hypertension) is the stiffening of blood vessels. This is where green tea can be beneficial. It contains antioxidants called catechins that help relax blood vessels. This improves blood circulation and can lead to a decrease in blood pressure. 

Green tea contains substances that can reduce inflammation and oxidative stress. Oxidative stress is characterized by the excessive accumulation of free radicals that damage cells in the body. Inflammation and oxidative stress can damage blood vessels and may be associated with high blood pressure. Consuming green tea can reduce this damage and support heart function.

A 2025 review of studies has shown that green tea supplements can cause a small but clinically significant decrease in blood pressure. (lent.az)