An Organ may give some of their nutrients to its creature’s supply at any time by changing the GNDT to reflect so. Any gift of nutrients to its creature’s supply decreases the hunger mood of the gifting Organ’s Creature by the number of nutrients given, as long as the hunger is above or equal to 0. If a gift of nutrients would cause hunger to become less than 0, it instead becomes 0.
If I read this correctly, an Organ can take 3 nutrients from their creature without increasing hunger, then put them back into the creature to lower hunger. If kept, it makes hunger irrelevant. Rather than proposing a fix, I propose to remove it since you can already transfer nutrients to another organ if needed.