Black Tea May Be As Effective As Green Tea for Reducing Weight Gain
Green tea has generally been considered to have more health properties than black tea. However, a study by researchers with the Kirin Holdings Company in Japan recently found that black tea may be as effective as green tea for reducing weight gain and cutting levels of body fat.
The findings of the study were published in the June 2010 issue of the journal Nutrition.
For one part of the study, male rats were fed a high fat emulsion containing 500 or 1,000 mg of a black tea extract. They then measured fat levels in the blood of the rats and found that the black tea extract suppressed increases of triglyceride levels in a dose-dependent manner.
The second part of the study used female rats and lasted for 8 weeks. The female rats were fed a standard or a high fat diet supplemented with either 1% or 5% of the black tea extract. Changes in body weight were examined during the 8 weeks.
The researchers found the rats who received the 5% black tea extract gained 56% less weight. In addition, the levels of the fat in their livers rose 81% less than those of the others.
Although further research is needed, these findings show that even though black tea has less antioxidants than green tea, it may be just as effective for avoiding weight gain.
The antioxidants in tea are called polyphenols and green tea contains 30-40% polyphenols whereas black tea only contains 3-10%.