Iced coffee, which is popular in summer, is actually high in calories.

Iced coffee, which is popular in summer, is actually high in calories, with some iced coffee as high as 561 calories, equivalent to a dinner, according to a new study by the World Cancer Research Fund (WCRF).

Most iced coffee has more than 200 calories, some more than 450 calories, the BBC reported, citing WCRF data. The foundation points out that sugar, whole milk and cream are the high-calorie drivers of iced coffee.

According to research by WCRF, Starbucks' limited summer coffee, BlackBerry Mocha Frappuccino, has 561 calories in large cups, equivalent to 1/4 of the calories women need a day. If you don't add cream, you have 457 calories.

Studies have also shown that even with skim milk, some iced coffees are still high in calories. For example, the nonfat mocha ice latte from Caffe Nero, an European coffee chain, has 452 calories.

Dr. Thompson, director of the WCRF science program, said that if you want coffee, you'd better choose sugar-free coffee with skim or low-fat milk, and don't have too much cream and sweet fruit syrup, because they are high in calories.