https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312295/
This is hot garbage. Most of it has nothing to do with whether or not you're a herbivore, omnivore or carnivore, and the ones that do are flat out wrong.
Our intestine has more in common with other omnivores and carnivores than it does with herbivores. We have no structure dedicated to digesting plant matter. Ruminants, like cows, have multiple stomachs to accomplish this task, while non-ruminant herbivores like horses have enlarged cecums. Our cecum is almost non-existent, which is what you'd expect for an omnivore or carnivore.
Our teeth are characteristically those of omnivores. We have both structure for chewing flesh as well as plant material.
The vast majority of animals are able to biosynthesize vitamin C, including most herbivores. Humans are among the very few animals that don't. That has absolutely nothing to do with whether or not you're a herbivore or carnivore.
The rest of it - methods of sweating, drinking water, etc. have absolutely nothing to do with diet.
In short, my days of not taking you seriously are definitely coming to a middle.