[MagiMaster]

While I agree that this is a gross oversimplification of real metabolisms, I'm just wondering which of the two options (or what other options) produce the least bad results. Bad results in this case don't mean just unrealistic, but ungameable too. Currently, neither seems to win out on either simplicity or obviousness, and I don't know what else to go on. I can't study this on real animals without another degree and some significant grant money.