Recent research comparing the gut microbiomes of humans and other animals suggests that we are evolved to eat more fruit.
From the Human Food Project:
"Research comparing the gut microbiome of humans and other animals using 16S ribosomal RNA gene sequences provide some interesting insight into the diet our microbiome might be most accustomed, tuned our immune system, and kept our gut from leaking. When the gut microbiome of herbivores (e.g., sheep, cow, giraffe, gorilla, horse, rhinoceros), omnivores (e.g., ring-tailed lemurs, baboon, humans, chimpanzee, bonobo, spider monkey), and carnivores (e.g., polar bear, dog, hyena, lion) are compared, human samples not surprisingly cluster more closely with other omnivores. Interestingly, when compared to other hominids, humans cluster more closely with the bonobo diet. While bonobos do eat a small amount of leaves and meat, they are true frugivores, with a diet dominated by, as the name implies, fruit. Therefore, from the perspective of the microbiome, humans may be considered frugivores, although specialized, eating seeds and meat depending on availability. Flexibility is fundamental."
Thoughts? The gut microbiome as one of two human genomes (or a new, combined, human genome) is an interesting paradigm shift. What are thoughts on being 'frugivores?' And what are further thoughts on using gut microbiomes as a basis for the paleo diet?