In the study, participants who drank 600 ml of green tea a day had 3% less brain damage (white matter lesions) compared to those who drank 200 ml or less. So drinking almost about 3 cups or more ...
Their daily intake of green tea and coffee was classified into four groups: 0–200, 201–400, 401–600, and at least 601 milliliters (ml). One cup of tea was equivalent to approximately 200 ml.