Green tea extract is a very popular supplement that people take to increase energy levels and encourage weight loss.
A study from Wake Forest University School of Medicine reported that a chemical called epigallocatechin gallate (EGCG) is toxic to the liver when consumed in large doses. Researchers reported that at least 20 cases of liver injury have originated from green tea extract supplements. However, these findings don’t apply to consumption of green tea because the EGCG levels don’t approach those present in green tea extract supplements.
We are in the dark about the dangers of herbal products such as green tea extract. While people from China have drunk green tea for centuries, it’s only recently that we’ve been able to concentrate key ingredients in herbal products.