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Comment by weavie | Hacker News Reader

It would make for an interesting experiment. Eat 3000kcal per day of doughnuts and cakes for a few months. See how much you weigh. Then switch to 3000kcal of organic meat, veg and healthy fats per day. Would your weight change in the same way? I can't say what the answer is. Has anyone tried experimenting with this?

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Yes, it has been scientifically proven about a bajillion or so times that a caloric deficit causes weightloss, and a caloric surplus causes weight gain, irrespective of the source of calories.

However, eating 3000kcal of "healthy food" is a lot harder than eating the same amount of "junk food", because "junk food" has a higher caloric density -- that is the very thing that makes the food "bad".

A person can easily eat 3000kcal of junk food in a day and still not be satisfied, while a person who eats as much healthy food as they can may still fall shy of 3000kcal.

If you burn the same amount of calories in both situations, why would it be different?

And this is why it in practice would be different: Different foods makes you feel different, and affects your willingness to be active and your ability to do hard exercise.

If you do control for activity (incredibly hard), then there's no reason why it would be different. If you don't, there are plenty of reasons why it would.

I think what you really mean is - healthier food makes you feel fuller, because it is less calorically dense Because of that, it is easier to consume less calories when you eat healthier foods.

http://www.boredpanda.com/what-200-calories-look-like/

Hormones?

What do you mean, that hormones have effect on how efficient your body burns calories?

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