I read about five or six articles about a parent’s addiction and how it affects the kids. there are many articles about alcoholism and how it affects the kids and there is even a group for children-adult children of alcoholics. But when it is food it is really difficult to find much. The article I have linked below is pretty good. It is pretty heavy-hitting emotionally as well.
Rory
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Source: How to cope with my father who is eating himself to death – Quora