It makes sense that growing a whole plant takes a lot of different things from the soil, and coating the area with a basic fertilizer that may or may not get washed away with the next rain doesn’t replenish all of what is taken makes sense.
But how would adding human poop to the soil help replenish things that humans need out of food?
We don’t absorb everything completely, so some passes through unabsorbed. Some are passed via bile or mucous production, like manganese, copper, and zinc. Others are passed via urine. Some are passed via sweat. Selenium, when experiencing selenium toxicity, will even pass through your breath.
Other than the last one, most of those eventually end up going down the drain, either in the toilet, down the shower drain, or when we do our laundry. Though some portion ends up as dust.
And to be thorough, there’s also bleeding as a pathway to losing nutrients, as well as injuries (or surgeries) involving losing flesh, tears, spit/boogers, hair loss, lactation, finger nail and skin loss, reproductive fluids, blistering, and mensturation. And corpse disposal, though the amount of nutrients we shed throughout our lives dwarfs what’s left at the end.
I think each one of those are ones that, due to our way of life and how it’s changed since our hunter gatherer days, less of it ends up back in the nutrient cycle.
But I was mistaken to put the emphasis on shit and it was an interesting dive to understand that better. Thanks for challenging that :)
Why would good nutrients end up in poop?
It makes sense that growing a whole plant takes a lot of different things from the soil, and coating the area with a basic fertilizer that may or may not get washed away with the next rain doesn’t replenish all of what is taken makes sense.
But how would adding human poop to the soil help replenish things that humans need out of food?
We don’t absorb everything completely, so some passes through unabsorbed. Some are passed via bile or mucous production, like manganese, copper, and zinc. Others are passed via urine. Some are passed via sweat. Selenium, when experiencing selenium toxicity, will even pass through your breath.
Other than the last one, most of those eventually end up going down the drain, either in the toilet, down the shower drain, or when we do our laundry. Though some portion ends up as dust.
And to be thorough, there’s also bleeding as a pathway to losing nutrients, as well as injuries (or surgeries) involving losing flesh, tears, spit/boogers, hair loss, lactation, finger nail and skin loss, reproductive fluids, blistering, and mensturation. And corpse disposal, though the amount of nutrients we shed throughout our lives dwarfs what’s left at the end.
I think each one of those are ones that, due to our way of life and how it’s changed since our hunter gatherer days, less of it ends up back in the nutrient cycle.
But I was mistaken to put the emphasis on shit and it was an interesting dive to understand that better. Thanks for challenging that :)
Thank you for taking it in good faith and for writing up a researched response, bravo to you!