Fish oil (EPA and DHA) is discussed for cardiac effects and potential role in ADHD, including dosing.

“Fish Oil, Cardiac Effects & ADHD, Tool: Fish Oil Dose, EPA vs DHA”

“you know studies over the years have explored fish oil for cardiac benefits and then more recently as I understand you know these are not sh have not been demonstrated and there seems to be a focus on the recent studies as if the old ones don't exist that's essentially what you described for both um cardiac and ADHD”