I know it helps decrease my appetite - I make it hot with a tablespoon of apple cider vinegar and a teaspoon of honey - tastes really good, and one day I got dizzy when i stood up and realized I hadn't eaten anything in over 24 hours! i drink it 3 times a day, half hour before each meal. I also cut out meat for four days of the week and walk half hour each day, I lost ten pounds since Saturday.
First of all you have to get a GOOD green tea, they're not all the same. Please, for the love of bob, avoid Lipton :) Yes, it's an excellent weight loss tool, it helps remove impurities from your body. You'll know if you've gotten a great tea if you start having some belly cramping, your body is trying to get rid of nastiness.