I read this as: "Humans and rodents have different metabolisms". It's still very good data and very interesting, but it raises more questions then it answers,

I read this as: "Humans and rodents have different metabolisms". It's still very good data and very interesting, but it raises more questions then it answers, and effectively points out that we have no clue how these metabolic pathways actually operate outside of specific circumstances. Edit: I'm in no way condemning this paper, on the contrary, I think it's great. This is good science.