Is it a matter of in/out? In other words, eat a pound of food, eliminate 8oz of waste, gain 8oz? If not, why not?
In: 1
In the short term of course it is a simple matter of in and out. It doesn’t matter if you are holding a pound of food in your hand or your stomach, they both contribute to your overall weight.
But it gets more complicated once you factor in digestion and its incorporation into your body. Your food is digested into its component parts and some of those are used to make cells or stored away in cells for future use. Cells can be thought of as bags of water, and the water content of your tissue is likely to be different than the food you eat. Chocolate for example is going to have much less water in it than the fat your body makes out of it.
By retaining water you could end up gaining more weight than the food you ate.
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