Studies on green tea’s impact on cancer have been mixed. But green tea is known to aid healthy cells in all stages of growth. There are some clues that green tea may help destroy cancer cells, but that research is still in its early stages, so you shouldn’t count on green tea to prevent cancer. In fact, the National Cancer Institute's web site says it "does not recommend for or against the use of tea to reduce the risk of any type of cancer."
With enticing names such as Green Tea Triple Fat Burner and Green Tea Slim, many people are drawn to supplements of green tea for weight loss. Consumers spent about $140 million on them in 2015, according to the latest data available from the Nutrition Business Journal. Meanwhile, tea, including green tea—made by steeping tea leaves or blending green tea powder in hot water—is the second most popular beverage worldwide, surpassed only by water.