The slimming effects of green tea have been well publicized, and preliminary evidence suggests that green tea may have a mild effect on weight loss. Studies report reduced body weight and body fat, as well as increased fat oxidation and thermogenesis.
But be careful what product you choose. Ready-to-drink, bottled tea drinks often contain concentrated flavorings, sugar or artificial sweeteners, and very little green tea. Some provide calories, but little or none of the weight-controlling benefits of green tea.
The best way to drink green tea is from brewed tea leaves. Most research is based on this form of the tea, which contains no calories. Powdered iced tea mixes fall somewhere between brewed tea and ready-to-drink beverages. If you drink them be sure to keep track of the calories.
You might also notice green tea added to foods in the form of tea extract. Whereas some studies have found the extract to be safe, others have not. So your best bet to get the possible slimming effects of green tea is to drink it brewed, in its non-caloric form.
Megan Porter, RD