Green tea is an antioxidant and is used in promoting cardiovascular health and reducing serum cholesterol levels in laboratory animals and humans. A study published in the journal Nutrition sought to assess the effects of green tea on metabolic syndrome (high blood pressure, obesity, high cholesterol, and insulin resistance) and inflammation in obese adults., It was found that green tea did not alter any biomarkers of metabolic syndrome or inflammation. However, it was determined that green tea reduced levels of amyloid alpha levels, which are thought to be a risk factor for cardiovascular disease. The green tea drink reduced amyloid alpha levels by 14.5 percent, while the extract reduced levels by 24.6 percent after eight weeks. These results suggest that although green tea may not have any effect on the features of metabolic syndrome, it does appear that it may reduce the risk of cardiovascular disease.1

1 Basu A, Du M, Sanchez K, et al. Green tea minimally affects biomarkers of inflammation in obese subjects with metabolic syndrome. Nutrition. 2010