Tea is widely considered to be beneficial for health, but evidence has shown that it may have particular benefits for the liver. One large Japanese study found that drinking 5–10 cups of green tea per day was associated with improved blood markers of liver health.
A smaller study in non-alcoholic fatty liver disease (NAFLD) patients found drinking green tea high in antioxidants for 12 weeks improved liver enzyme levels and may also reduce oxidative stress and fat deposits in the liver.
Furthermore, another review found that people who drank green tea were less likely to develop liver cancer. The lowest risk was seen in people who drank four or more cups per day.
A number of mouse and rat studies have also demonstrated the beneficial effects of black and green tea extracts. For example, one study in mice found that black tea extract reversed many of the negative effects of a high-fat diet on the liver, as well as improved blood markers of liver health.
Nevertheless, some people, especially those who have liver problems, should exercise caution before consuming green tea as a supplement. That’s because there have been several reports of liver damage resulting from the use of supplements containing green tea extract.
Black and green tea may improve enzyme and fat levels in the liver. However, exercise caution if you’re taking a green tea extract, as it may cause damage.