Lately, I’ve been delving deeply into macronutrients, and from what I’ve gathered, food primarily consists of carbohydrates (starches, sugars, fiber), fats ([un]/saturated, trans fat), and proteins.
However, I’m still struggling to grasp which calories listed in the food labels are converted into faeces. Could someone please help me break it down?
In: Biology
Nutrients are, by definition, absorbed into the body. Maybe not completely, but mostly. Feces are mostly things that can’t be absorbed, such as fibers, plus digestive juices and gut bacteria, with most of the water absorbed.
Once absorbed, nutrients are broken down and used by the body, and the waste products are mostly either exhaled or expelled in the urine.
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