what happens when you dry fruit that increases calories?

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Fresh fruit is not very high in calories (except bananas i guess). What happens on a chemical level when you dry fruit? Why are calories increasing? Why isn’t calorie level the same when all you do is let water evaporate?

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Calories are increasing per gram, since you’re removing water which has no calories but adds weight.

Water has weight. So when you remove 50 grams of water from a 100 gram apple, you are left with a 50 gram dried apple with the same calories as the original. No new calories are created.

There is a lot of water in fruits so when you are drying it you are removing that water from it. When this happens all the sugars intensify which is why it is also quite sweet and well bad for you when you have a lot. If you do have it you should mix it in with oats and like yogurt for a more balanced meal.

The calorie count doesn’t increase, the calorie *density* increases. If you eat 500g of grapes, much of that weight is calorie free water. If you eat 500g of raisins, you’re eating many more grapes, and there y many more calories.

The calories are most likely calculated by weight, so a 1/4 pound piece of fresh fruit that contains, say 10 grams of fructose, will still contain 10 grams of fructose when the fruit is dried, even though the fruit has lost all of its water weight and now only weighs 25 grams. It went from 40 grams of fructose per pound of fresh fruit, to 40 grams of fructose per 100 grams of dried fruit. It’s just the amount of sugar by weight, and all of the water weight is lost through drying, though the amount of sugar doesn’t change.