On 21 April 2003 the Brigham and Women's Hospital released details of a research project which indicated that theanine may help the body's immune system response when fighting infection, by boosting the disease-fighting capacity of gamma delta T cells. The study included a four-week trial with 11 coffee drinkers and 10 tea drinkers, who consumed 600ml of coffee or black tea daily. Blood sample analysis found that the production of anti-bacterial proteins was up to five times higher in the tea-drinkers, an indicator of a stronger immune response. (23)
Effects on bad breath
Increases metabolic rate
Clinical trials conducted by the University of Geneva and the University of Birmingham indicate that green tea raises metabolic rates, speeds up fat oxidation and improves insulin sensitivity and glucose tolerance. (17) In addition to caffeine, green tea contains catechin polyphenols that raise thermogenesis (the rate at which calories are burned), and hence increases energy expenditure. (18)
There is also a suggestion that it can increase endurance in exercise by improving fat metabolism. (19)
Now, I could go on and on, but as you can see many studies have proven the health benefits of tea. I will leave the hard work to the researchers and pass on the good news to all of you!
Coming tomorrow: Part III (tea sweets and savories). My favorite...get your taste buds ready!