Researchers went on and experimented the effects of green tea on the development and reproduction of fruit flies. In the experiment, they exposed fruit fly embryos and larvae to changing doses of antioxidants found in green tea, called polyphenols .Larvae that was exposed to higher amounts of green tea polyphenols, , "were slower to develop, emerged smaller and exhibited a dramatic decline in the number of emerged offspring." The polyphenols did protected them against dehydration, but also caused them to be more sensitive to starvation and heat stress.The polyphenols had been found to have "a negative impact on reproductive organs in both males and females," like  atrophic testes in males. "Collectively the data show that high doses of GTP adversely affect development and reproduction" of fruit flies, the team wrote.
Could the tea harm humans as well?