Studies Show Green Tea Extract Can Cause Liver Damage or Death! We all know that taking supplements can lead to better health, but what if you’re taking the wrong supplements? Consumer Reports recently surveyed 15 Supplement Ingredients to Avoid. Possible risks include liver damage, heart attack and even cancer! Not only that, if you’re taking prescription medicine, it could interact in a dangerous way that may even lead to death! Of these supplements, one of the most popular is green tea extract.