Mag Glycinate plus Optizinc seem to slightly improve sleep for me, but it didn´t feel enough to justify the expense.
I am currently experimenting with Bacopa and huge doses of Ashwagandha, need more time to draw a conclusion. I have tried like 15 different supplements for sleep and a few meds, of course most failed.
DHD above mentioned worked great for a few days but now I need to take double and still doesnt kock me out like it used to. Besides, it makes you feel crappy so why bother?
Look at the thread I started like last year, and also the one I have on longecity with the name "HoldingTheFaith". A lot of ideas are given, sadly I haven´t found anything that works yet. As you can see I have been and will be desperate for some good sleep. I have done threads on it in about two forums more lol
The way I see it, sleep is a major biomarker of good body functioning, it is both a cause and a consequence of good health. So rather than looking for that supp or med that will restore sleep, working in improving overall health should overtime give a more refreshing sleep.