How much food is absorbed, and how much comes out again?

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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

24 Answers

Anonymous 0 Comments

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.

Anonymous 0 Comments

My dude, 500kcal is for one portion of noodles and not the whole 800gr can.

800gr would be around 2000-3000kcal.

Anonymous 0 Comments

My dude, 500kcal is for one portion of noodles and not the whole 800gr can.

800gr would be around 2000-3000kcal.

Anonymous 0 Comments

My dude, 500kcal is for one portion of noodles and not the whole 800gr can.

800gr would be around 2000-3000kcal.