My two cents.

ADHD brains like a hit from dopamine. Some say this science is changing.

My brain loves cake, pudding and ice cream. Abd cheese.

Like an addict, it wants another hit. Refusing such foods is nearly impossible. Only when extra effort is put in place or a long time into ketosis helps.

None of these studies seem to delve into different brains.

A reward perspective presented thru a couple studies..
https://youtu.be/9QiE-M1LrZk?si=EOvjKRR3q9_1RSk1

Why we reach for another piece of cake.