Catechins are antioxidants that fight and may even prevent cell damage. Green tea is not processed much before it’s poured in your cup, so it’s rich in catechins. In an independent Japanese test daily consumption of tea containing 690 mg catechins for 12 weeks reduced body fat, which suggests that the ingestion of catechins might be useful in the prevention and improvement of lifestyle-related diseases, mainly obesity. As a gauge, one cup of green tea may contain about 50mg catechins.