Women could be consuming more than a quarter of their daily calories with just one iced coffee, an expert has warned. One drink can contain as many calories as an evening meal, putting people at increased risk of obesity and therefore cancer, she said. Dr Rachel Thompson, science program manager for the World Cancer Research Fund (WCRF), analyzed the calories at three leading high street chains: Starbucks, Caffe Nero and Costa Coffee. Most iced coffee drinks contained over 200 calories, with some measuring in at around 450. A Starbucks venti dark berry mocha frappuccino blended coffee with whipped cream has the highest number of calories - at 561. The tall option (the smallest size offered by Starbucks) was 369 calories. Without whipped cream, the venti option still has 457 calories and the tall option has 288. However, a tall iced coffee, which is chilled black coffee over ice, is just three calories, with the venti option containing only five calories. Dr Thompson said: “The fact that there is an iced coffee on the market with over a quarter of a woman's daily calorie allowance is alarming. “This is the amount of calories you might expect to have in an evening meal, not in a drink.”