Here is what WebMD tells me about green tea extract, “Green tea is used to improve mental alertness and thinking. It is also used for weight loss and to treat stomach disorders, vomiting, diarrhea, headaches, bone loss (osteoporosis), and solid tumor cancers. Some people use green tea to prevent various cancers, including breast cancer, prostate cancer, colon cancer, gastric cancer, lung cancer, solid tumor cancers and skin cancer related to exposure to sunlight. 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.
Green tea is also used for Crohn’s disease, Parkinson’s disease, diseases of the heart and blood vessels, diabetes, low blood pressure, chronic fatigue syndrome (CFS), dental cavities (caries), kidney stones, and skin damage.”
OK, this supplement does contain caffeine and when used by itself (without a pot of coffee) it won’t give you the shakes, but be careful taking too much and with caffeine and it will. This peaks your mental alertness and give you a boost of energy right away. There is a difference you will surely notice! But its a great boost! Green tea itself, as shown above, does wonderful things for your body!