Experimental design
Before the start of the study, a pilot experiment was conducted in order to determine the dosage of GT. Four female overweight sub- jects (age 37·5 (SD 13·1) years, BMI 25·8 (SD 1·6) kg/m2) partici- pated in this experiment, which consisted of three indirect calorimetry tests. The day before the test, the subjects’ food and caffeine intake were standardised by the investigators. On the day