Why not all calories are the same, and why we should pay less attention to calories and focus more on what is the actual food we are eating.
According to Dr Giles Yeo, who is a renowned researcher on obesity at the university of Cambridge, every calorie count you see is wrong.
Take protein. Only 70 percent of 100 calories of protein that we consume will be used as fuel inside us for energy. The other 30 calories are actually used to metabolise the protein to enter our bloodstream.