I have some more information to add to the extract page.

1. Green tea bags are used to decrease puffiness under the eyes, as a compress for tired eyes or headache.[1]Slavedriver79 (talk) 14:54, 28 April 2014 (UTC)Reply

2. Some women use green tea to fight human papilloma virus (HPV), which can cause genital warts, the growth of abnormal cells in the cervix (cervical dysplasia), and cervical cancer.[2]Slavedriver79 (talk) 14:54, 28 April 2014 (UTC)Reply

3. The caffeine in green tea, especially when taken in large amount, can worsen diarrhea.[3]Slavedriver79 (talk) 14:54, 28 April 2014 (UTC)Reply

4. Amphetamines, Cocaine, Ephedrine and other stimulant drugs may cause to much stimulation and sometimes serious side effects and heart problems when used with the extract.[4]Slavedriver79 (talk) 14:54, 28 April 2014 (UTC)Reply