Calories help, but especially for high-fat, low-carb diets they are pretty useless (see http://news.ycombinator.com/item?id=4892592 http://news.ycombinator.com/

Calories help, but especially for high-fat, low-carb diets they are pretty useless (see http://news.ycombinator.com/item?id=4892592 http://news.ycombinator.com/item?id=4892592 )