Cidtalk asked the Naked Scientists:
I love your show. I listen while I work 12 hour shifts in a data centre in Missouri, USA.
My question is about calories.
If calories are determined by how much energy it takes to burn them, after cooking butter, oil, sugar, etc. have some of the calories burned away? In other words, does combining and cooking food change the calories in each ingredient or the dish as a whole?
If a unit of sugar = 100 calories and a unit of flour = 100 calories and then you use them as ingredients in a recipe like cookies, after the process of baking and cooling the cookies, would the combination still = 200 calories?
Thanks very much,
What do you think?