I always thought that most of the food comes out again after nutrients are absorbed.
For example, here is a can of noodles. It says the 800gr in the can have a total of something like 600kcal. If the entire can would be converted into fat, this would have to be about 5500 kcal. That would mean that about 90% of it comes out again.
But sometimes I eat and eat and eat and a lot less is coming out then went in.
So, how much food is actually coming out again after being processed in the body?
In: 128
Most of the food is absorbed beside fiber. There’s also some amount of water that isn’t absorbed, but it’s a small fraction. For all other nutrients, it’s negligible.
Your pasta isn’t mostly fat, why would you assume that.
Dry pasta is mostly carbs which have 4 calories per gram. It has also some water left and some unfermentable fiber left that have 0 calories per gram, and some fermentable fiber that has around 2 calories per can gram.
Your 800 grams of pasta have more than 500 calories. That’s for a portion of it.
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