Beverage Partners Worldwide has produced scientific evidence to back its claims for its soft drink Enviga.

The company, a joint venture between Nestlé and The Coca-Cola Co., yesterday (12 February) pointed to a clinical study published in the medical journal Obesity.

The study concluded that people who drank the equivalent of three Enviga beverages in one day burned 106 extra calories per day. That amount is equivalent to a 4% increase in the amount of energy each person used compared with people who drank a low-calorie beverage placebo.

The study, conducted by the University of Lausanne, Switzerland, in collaboration with the Nestlé Research Centre, found that three servings per day of the sparkling green tea drink increased the amount of energy study participants used without any negative effects on heart rate or blood pressure.

"Enviga represents the perfect partnership of science and nature, providing an optimum blend of green tea extracts (EGCG) and caffeine," said Rhona Applebaum, chief scientific and regulatory officer at The Coca-Cola Co.

"Enviga complements - but does not replace - the need for regular physical activity and a moderate, varied and balanced diet. It is not designed as a weight loss product."

BPW has come under pressure this month for claiming that Enviga speeds up the burning of calories. US consumer watchdog The Center for Science in the Public Interest, has filed a lawsuit against the company, claiming that it is making "fraudulent claims".

"There is no clear evidence that what's in Enviga will help you control your weight," said CSPI senior nutritionist David Schardt. "You'd be much better off giving up non-diet soda, which costs nothing to do, or by joining a gym, which is typically less expensive than paying for three cans of Enviga a day."