I agree with JenSMP about the benefits of exercise. DS6 and DS2 both take the following vitamins:
SmartyPants gummy multivitamins with Omega 3 (yes, the name is retch-worthy but the vitamins are not; I haven't found a less fishy fish oil supplement) and
Vitafusion B complex gummies, with an occasional supplement of
Rainbow Light vitamin D lemon gummies.
We only started this about 4-5 months ago, but the kids seem to have more energy and to be happier. Stopping the relentless beatings may have helped with that as well, but it's hard to tell. DS6 previously seemed to become less frenzied with different fish oil capsules, but that could also have been a coincidence.
