"Leading Japanese cosmetics and toiletries manufacturer Kao (TSE: 4452) announced the results of its latest research on highly-concentrated tea catechin. The recent survey of healthy male subjects indicated that a regular intake of beverage containing highly-concentrated tea catechin can effectively burn body fat after a meal while elevating postprandial energy expenditure." (reference)

VitaminDepotOnline features a product called Life Extension Herbal Mix which contains green tea extract and catechin.