A new research study designed to examine the possible benefits of green tea on blood sugar health and weight loss was recently published in Nutrition Journal (free to download)[1]. For this study, investigators asked 14 healthy volunteers to consume a meal with either green tea or water at two different times. Each meal consisted of white bread with sliced turkey and 300 ml of the assigned drink. Green tea was brewed and served hot with the meal. Blood samples were taken prior to eating the meal and at several time points after eating the meal. During these time points, study volunteers were also asked to fill out questionnaires related to feelings of fullness. The study investigators reported:
Green tea consumed with a meal had no effect on markers of blood sugar health.
Consumption of green tea with the meal resulted in greater feelings of fullness at 15, 45, 60, and 90 minutes after the meal compared to drinking water with the meal.
Study volunteers had stronger feelings of having consumed enough after the meal with green tea compared to the meal with water.
The desire to eat one's favorite food was lower after consuming green tea compared to water.
This new study continues to suggest that green tea might have a role in our weight loss efforts by reducing our hunger. While other studies have reported that green tea might aid in weight loss by increasing metabolism or increasing fat oxidation, this study indicates that green tea, particularly brewed green tea, might help suppress appetite. Suppression of appetite has the potential of reducing the amount we consume, an important aspect of any weight loss plan. The green tea consumed in this study provided about 150 milligrams of catechins (plus about 80 mg of caffeine). It is important to remember that the amount of green tea catechins will vary widely from product to product and is likely to be lower in ready-to-drink green teas than in freshly brewed green teas. Nonetheless, for individuals looking to control their weight, drinking green tea with one's meal might be one easy, potentially beneficial change to make.