bio-availabilty? plants have lots of vitamins and minerals, so they are nutritious for us to eat! or do they just make our stool vitamin rich? consider this:

or to look at things another way, ask what organ we have to digest something..!
I am 77 years old, like to exercise and am intensely interested in the effect of food on the body. I am running an N=1 experiment since Jan 2018.
bio-availabilty? plants have lots of vitamins and minerals, so they are nutritious for us to eat! or do they just make our stool vitamin rich? consider this:
or to look at things another way, ask what organ we have to digest something..!