If feces is the bits of food that our body couldn’t digest or use, is it possible to eat a diet that our bodies can use 100% and never have to defecate? And, if so, could such a diet ever be healthy or would it always be deficient in some nutrients?

Question

If feces is the bits of food that our body couldn’t digest or use, is it possible to eat a diet that our bodies can use 100% and never have to defecate? And, if so, could such a diet ever be healthy or would it always be deficient in some nutrients?

In: 90

Answer 1

No, and this is because your body is acting as a giant bioreactor which means, stuff goes in, and stuff goes out. The same amount. Just changed by your biochemical reactions into different end products, similar like fire transforms wood into ashes.

If you wouldn’t poop (pee, exhale) the same amount of matter as you intake, you would become heavier over time by exactly this amount.