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Description:
Green Tea Extract Increases Metabolism May Aid in Weight Loss
Healthy subjects who received daily caffeinefree green tea extract capsules had an increased production of detoxification enzymes which may provide some cancerfighting benefits study findings show
Concentrated green tea extract could be beneficial to those who are deficient in the detoxification enzyme and shouldnt be harmful for those who have adequate detoxification enzyme lead investigator Dr HH Sherry Chow of the University of Arizona Tucson said
Genetic and environmental factors cause people to have varying levels of glutathione Stransferase GST enzymes These enzymes may play a crucial role in helping the body defend against toxic and cancercausing compounds note Chow and colleagues
Previous laboratory and animal studies found that green tea compounds antioxidants called catechins activate these GST enzymes Therefore Chows team investigated the effect that concentrated compounds from green tea would have on GST enzymes levels in 42 healthy adults
Their findings are published in the medical journal Cancer Epidemiology Biomarkers and Prevention
For 4 weeks prior to the study the nonsmoking volunteers refrained from drinking green tea taking supplements or eating foods known to contain epigallocatechin gallate a potential cancerfighting antioxidant
Over the next 4 weeks the volunteers took four capsules each containing 200 mg of epigallocatechin gallate every morning prior to eating This provided the equivalent amount of epigallocatechin gallate obtained from drinking 8 to 16 cups of green tea daily Chow said
The researchers found that the detoxifying GST enzymes increased by 80 percent in the study participants with the lowest GST levels at the start of the study Participants with medium or high GST levels had either no increase or a slight increase in GST levels
The capsules used in this study were specifically made for clinical trial use Chow cautions that commercially available green tea extracts are not required to meet the same strict concentration and purity standards
Chow adds More clinical testing is underway to confirm the cancer preventive activities of green tea or green tea extract
