yes, ginseng...tea..but needs to have a control diet

Wu-yi tea definitely works. I have used it before.

Hi
Green tea originates from China and is a drink that is made with the leaves of camellia sinensis which is a well known tea plant. This kind of tea undergoes minimal oxidisation and processing and as a result its goodness and nutrients are retained.
Comprehensive scientific studies have shown that green tea increases the metabolic rate making the body consume calories with much more efficiency. This increase is referred to as a thermogenic effect and it assists a weight loss program by increasing the body temperature thus helping the body burn more calories. A fast metabolism also reduces the likelihood of any unused calories being stored as fat.
Green tea also contains a large amount of antioxidants that are known to inhibit cancer cells and in some cases kill cancer cells without harming healthy tissue. Recent studies have also shown that breast cancer spreads less rapidly in women who are known to drink five or more cups of green tea a day.
There is evidence that drinking green tea can also lower cholesterol levels and inhibits the formation of blood clots which are a contributing factor leading up to heart attacks and strokes.
Green tea has revolutionized the slimming industry and many people use it as a simple and pain-free solution to losing weight. For those people who hate the idea of going to the gym or losing weight through exercise losing slimming by drinking tea is particularly appealing.
Green tea products have become hugely popular all over the world but there are lots of other slimming tea beverages that have been developed by some manufacturers in an attempt to keep up with demand for these weight loss products.
Research suggests that if the average person were to drink five or six cups of green tea a day then they would burn an extra 90 to 100 calories. Consuming this amount of green tea is not too hard as it can replace your normal tea or coffee drink throughout the day.