For us runners, nutrition is very important, especially for those who are looking to loose weight. I was wondering if people generally know that when they read about Recommended Daily Intakes/Allowances of carbohydrates, proteins and fats, that the percentages given refer to the % of Kcal from each nutrient, rather than the % of a food's weight? So when we are told to have a diet with say 60% carbs, 25% fats and 15% proteins, looking at food labels is only of so much help.
It does seem confusing that food packaging has the weight in grammes of fat/CHO/protein and the total calorific value, but not the % of Kcal of each of these nutrients. To work this out would mean taking a calculator to the supermarket! Given that 1 gramme of fat leads to a digestible 9 kcal of energy compared to the 4 kcal in 1 gramme of carbohydrate or protien, it's easy to get confused... In fact I'm confusing myself now.........so I'll stop.