Tapping the community wisdom .........
I'm slowly learning, in a piecemeal fashion, about diet for cycling - current wisdom/fashion seems to suggest a diet of 50% carbohydrates, 30% proteins and 20% fat.
I'm starting to look more attentively at food labels, but I'm confused. These commonly state the kcal value of 100gms of the contents and then break down the 100gms by percentage into carbs, protein, salts, fats etc. but give the proportions in weight not kcal. But the different types of food type have different kcal/gm values don't they? So if something is 300kcal per 100 grams and contains 40gm of carbs it doesn't follow that you're getting 120kcal from the carb content does it?
So is there a definitive kcal value per xgrams of carb/protein/fat etc.?