The possibility that green tea helps with weight loss has been a recent topic in the media.
What is the potential role of tea in helping maintain healthy weight? Unsweetened, tea, both black and green has with or without milk no sodium, no sugar, little or no fat and virtually no kilojoules, yet tea is a satisfying, aromatic beverage. This makes tea an ideal choice for a weight control plan that is part of a healthy lifestyle, especially when substituting for other sugar sweetened beverages.
Another factor to potentially maintain a healthy weight is that regular tea contains caffeine which has been shown to increase energy expenditure (number of kilojoules burned)(17,18). In a study, published in the Journal of Nutrition, consumption of 3-4 servings of oolong tea was shown to increase energy expenditure and the rate of fat breakdown. In addition, subjects drinking tea spent energy at a 3% faster rate and burnt about 70 more kilojoules a day than those consuming water (48).
Some emerging research on energy expenditure conducted with tea and tea extracts has suggested that increases in metabolism and rate of fat breakdown may not be solely due to caffeine in the tea. One study measuring the effect of green tea extract on energy expenditure in people showed that drinking either caffeinated water or tea extract significantly increased the number of kilojoules burned, but in addition the rate of fat breakdown was significantly higher for participants drinking tea extract than those drinking the caffeinated water(49).
In a second study researchers looked at group of flavonoids in tea and its effect on weight loss and body fat. They found significant weight loss and a significant reduction in total body fat in the people drinking tea flavonoids (equal to 3-4 cups of tea per day) when compared to participants drinking the placebo (66 ).
While this is active area of research; the preliminary evidence suggests the tea drinking can increase energy expenditure and fat burning. However, there are no conclusive studies that tea drinking has beneficial effects on weight loss. Still, tea is a satisfying, low kilojoule beverage that can be substituted for sweetened beverages and is a delicious alternative to plain water in a healthy weight management plan.