I may have mentioned before - maybe not - that different supplements may be more useful than others depending on the type...
Insomnia Type I - where one can't get off to sleep...
Insomnia Type II - where one wakes up intermittently
Insomnia Type III - where one wakes up too early and can't go off again
Rider:- Rotating shift work, pregnancy, cardiac issues (like fibrillations and mitral valve weakness) can upset all of the above