Or is that really true?
No – because the interesting thing is not only what you put in your mouth, the important thing is what your gut is able to absorb.
And it's different from person to person how big a difference there is on this and what you chew in you.
What the intestine takes up should then be enough to build and renovate everything in your body. And it's not just organs to be maintained – you need building blocks for all the signals that are going to go through your brain and body as part of all your thoughts and feelings.
What building blocks does your body work with?