Thanks for the info. But in the city screen, when I hover over the food difference (food produced - food consumed) and the health difference, I don't see anything like that in the tooltips, and I don't think I see anything extra happening in my city growth either. I do see a strange Dujiangyan positive food modifier in the food difference tooltip even though I don't have the wonder, but that also doesn't seem to affect my growth situation. And I'm still in the Ancient era. Is there a better way to test this? As far as I can tell, I'm not getting any extra food growth from having extra health. Edit: I'm seeing that some of my cities are getting the excess health to food bonus while some of them aren't. And the strange Dujiangyan food modifier has the same number of excess health/food bonus to it.