Earlier quoted context omitted.
No, it’s absolutely only about low serotonin. Dopamine spikes do directly result from sugar spikes, but that is the effect and not the cause.
I'm honestly interested in hearing the research on this Do either of you have sources?
So, here is my quick and slipshod armchair theorizing: serum serotonin levels may be a predictor of ADHD due serotonin's role in activating certain autoreceptors that mediate dopamine release.
Does serotonin deficit mediate susceptibility to ADHD?: https://www.sciencedirect.com/science/article/abs/pii/S01970...
Is there an Effect of Serotonin on Attention Deficit Hyperactivity Disorder?: https://repository.unair.ac.id/106894/1/Is%20There%20an%20Ef...