Studies keep showing sugar does not cause hyperactivity in children.
I assume the sugar myth is because food dye causes hyperactivity:https://pubmed.ncbi.nlm.nih.gov/32006369/https://ncbi.nlm.nih.gov/pmc/articles/PMC9573786/https://ncbi.nlm.nih.gov/pmc/articles/PMC4321798/https://pmc.ncbi.nlm.nih.gov/articles/PMC3441937/
I assume the sugar myth is because food dye causes hyperactivity:
https://pubmed.ncbi.nlm.nih.gov/32006369/
https://ncbi.nlm.nih.gov/pmc/articles/PMC9573786/
https://ncbi.nlm.nih.gov/pmc/articles/PMC4321798/
https://pmc.ncbi.nlm.nih.gov/articles/PMC3441937/