I am 61 and have had various issues with insomnia. In many ways now I have less of a problem than I had previously, but I have learnt a lot and I now take quite a range of supplements that enable me to handle sleep issues so at times I am no longer tired during the day.
I have joined this forum to see if there is anything else I can try. That is not so much because I am not handling things already, but I am studying how sleep works and as part of this it helps to read anecdotal reports as well as RCT research papers.
At least from my point of view I no longer normally have a problem going to sleep, but I do from time to time have a sleep maintenance problem where I wake up in the night and have difficulty getting back to sleep.
What I would say to anyone is that the first thing to do for good sleep is what is called CBT - Cognitive Behaviour Therapy (keeping the room dark, not looking at phones or computers (avoiding blue light) and having regular sleep patterns.
After that, however, I think it comes to the three sleep systems that in the end come back to the activity of the neurons.
The first of these is sleep pressure, the adenosine, (which can be affected by caffeine)
The second of these is the GABA Glutamate balance which controls how active neurons are (beyond how much people are thinking). This is affected by lots of things including Magnesium, Calcium and Vitamin D - as well as how much people are worrying about things.
The third is the melatonin system where the Pineal Gland inserts melatonin into the Cerebral Spinal Fluid that bathes the brain and has what is called a GABAergic effect.
It is I think important to separate out the melatonin processes because they are clearly circadian.