Hyperactive Metabolism in the new hunger system

I’m currently playing with the Nechronica mod, and eating zombies/drinking out of toilets is a surprisingly fun experience. However, I just mutated from Extreme to Hyper metabolism and I have no idea how that works under the new food management system, since ‘overeat’ isn’t really as simple as it was. Can anyone explain it? It’s kind of necessary since my Health is basically terrible all the time and I don’t really heal naturally.