How much green tea is safe to drink per day?

Green tea is a popular beverage that has been consumed for centuries in Asia. It is made from the Camellia sinensis plant and contains caffeine and antioxidants. Green tea is generally considered to be safe to drink, but consuming large amounts may cause side effects, such as jitteriness, anxiety, insomnia, nausea, dizziness, headaches, diarrhea, kidney problems, constipation, iron deficiency, or liver damage.

The European Food Safety Authority (EFSA) has established a safe daily intake of 800 mg of catechins from green tea extract, which is equivalent to approximately 10 cups of green tea per day. The United States Food and Drug Administration (FDA) does not have an established safe daily intake for green tea but recommends limiting intake to 4 cups per day.

However, the optimal amount of green tea that is safe to drink per day may vary depending on an individual's health status and caffeine sensitivity. For example, people with heart conditions or anxiety disorders may want to limit their intake or avoid green tea altogether. It is always best to consult with a healthcare professional before consuming large amounts of green tea.