Require less food to lvl up w/ gluttony and make food go bad
Food should realistically go bad after 12 hours or a few days. This would not count for raw materials/ingredients, otherwise it would be stupid. Well, in return it should require less to lvl up your humours. You could also simply make food stay normal as it is now, but all newly created food would be named "Fresh xxx" for a 12 hours (or after a few days. Whatever.) and this would boost that food (boost with a multiplier, perhaps). If you want you could also keep the gluttony levels as they are and simply boost/multiply the healing of "Fresh" foods.