I enjoy Chipotle, quite a lot. If I were to take on a diet chiefly composed of Chipotle (along with enough other stuff to avoid vitamin deficiencies and other problems), what percentage of my body would eventually be composed of molecules that came from burritos? Maybe a good upper bound: how much of our body mass comes from the food we eat, rather than water we drink or air we breathe?
Well, as amazingly delicious as Chipotle burritos are, I don’t think they contain enough water to sustain you, so I imagine the water taken in direct liquid form would remain a substantial constituent of your mass. But if you set aside your water mass, I suspect that a burrito of sufficiently diverse construction could contain all the basic chemical compounds required for the construction of your body. To hazard a guess, maybe almost all of your non-aqueous mass could be made of burritos.
So, I think you could be maybe as much as 30 or 40% burrito by mass.
Well, according to the only cite I could find bean burritos contain 52.5 grams of water per 100 grams of burrito. Chipolte burritos are about 1.5 pounds, so you’ve got about 679 grams of burrito, or roughly 340 grams of water. You need roughly 2,000 grams of water per day so you’d have to scarf 6 burritos per day
If you did that, and only took vitamin supplements to fill the rest of your diet out I don’t see why upwards of 99% of your body couldn’t be made of burritos.
Of course I have NO IDEA how accurate the water content for burrito statistic is so that could be totally wrong.