How much human waste is produced after eating 1lb of food?

Answer:
depends on the food and your metabolism

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crap in a cup and weigh it

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depends on what you eat.

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there are so many variables to that question. What type of food is it? Are there some parts that aren't digestable, are the parts of the food highly nutritious and are absorbed more than others. What nurtients does the person need because if you don't need it, your body will throw it out, most likely. There are too many variables to correctly answer that questions.

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