Before we start, let me say that our bodies were made to be very resilient. We can survive on different diets and on different kinds and quality of food. You can even go years eating various things without seeing any degradation or effects. But the question is, do you want to merely survive or thrive? It is much better to trust the diet that the Creator of the universe has prescribed and not lean on our own understanding.
Everything that is alive was not made to be food. Creatures and plants were not all made for the same purpose, just as human have different skills, the creatures have different uses. In nature we see species that excel at certain applications. While we may never know the full purpose God intended for a certain plant or animal, we can still notice where species excel. For instance, camels and horses are excellent at transportation. Vultures are excellent at cleaning up dead meat. Roses are excellent at beauty and fragrance. Hevea brasiliensis are excellent trees that are used to make rubber. (Thanks Google)