I am on heaps, but part of it is anti-aging stuff. (I am 65).
For general health, I take a high potency multi (Eagle brand, Tresos-b with selenium) that doesn't have iron (due to being post menopausal), and 6000 mg fish oil (6 caps). I also take supplemental calcium, and one magnesium supp a day.

The magnesium might help you with sleeping, if it is only due to physical and not life pressure/anxiety/depression issues. Exercising helps as well of course.

Val