Red 40 has been extensively studied: "the available scientific evidence does not...

nradov on Dec 27, 2018 | parent | context | favorite | on: Industry pushes sugary products, while obfuscating...

Red 40 has been extensively studied: "the available scientific evidence does not substantiate a link between the color additives and behavioral effects".

https://en.m.wikipedia.org/wiki/Allura_Red_AC

Maybe something else is going on with your grandchildren?