Green tea reduces body fat accretion caused by high-fat diet in rats through beta-adrenoceptor activation of thermogenesis in brown adipose tissue. Conducted by chief scientist J.J. Choo of the Department of Food and Nutrition, Kunsan National University, this study aimed to find out if green tea can suppress body fat and to find out whether this suppression is connected with thermogenesis spurred by the body’s beta-adrenoceptor being activated.
To investigate the weight loss benefit of green tea on rats, the scientists placed their subjects on a high-fat diet and provided them with green tea extract. It was discovered that even though the rats were on a high-fat diet, the green tea extract counterbalanced fat gain without affecting the amount of energy they took in. Green tea was said to have shown some weight loss benefits in the fact that it can prevent fat from being stored, can increase protein levels, and promote thermogenesis by triggering beta-adrenoceptor to action.
Recent findings of green tea extract AR25 (Exolise) and its activity for the treatment of obesity. This study is a collaborative work between Doctors P. Chantre and D. Lairon of the Laboratoires Arkopharma in Carros, France. Published in the 2002 issue of Phytomedicine, this study aimed to find out if green tea extract has weight loss benefits and can be a potential cure for obesity.
In their study, they used an 80% ethanolic concentrate in green tea extract with standardized 25% catechins. They tested the green tea extract and were able to find that it could directly inhibit gastric and pancreatic lipases. These enzymes are the primary cause of fat storage and by delaying their actions; green tea extract therefore exhibits a weight loss benefit that can help solve obesity problems.
It was also discovered in this study that green tea can stimulate thermogenesis. Given to moderately obese patients, the green tea extract was said to have caused a decrease in weight by 4.6% and a reduction of waist circumference by 4.48% after only three months. The findings of the study clearly implicate the weight loss benefits of green tea.