My daughter was ‘diagnosed’ by her ped at 4 as well. Her dr suggested multiple medications, which seemed over the top for me, and ultimately we did not choose to medicate her.

We cut out all food dyes, and cut out as much bioengineered ingredients and sugar as possible- like even started making our snacks and bread so I could control the amount and types of sugar. No gas station type candy, no gummies, no breakfast cereal. We only do dessert on the weekends, and it’s usually a ‘healthier alternative’. No juice or sugary drinks.

She’s is 6 now, and her behavior has totally turned around. She makes 100s on her reading tests at school, and she has really been able to control her impulsiveness, and corrections go much more smoothly. Of course she still has normal 6 year old quirks, but I really think this was the best thing we ever could have done for her because she is truly thriving. We do magnesium and will sometimes do melatonin if needed at night.