I also think anyone with chronic insomnia should be checked for apnea. I'm thin and don't snore, so apnea didn't occur to me, but it showed up when I got tested. I have apnea because I have a small airway and a long palate. My ENT thinks problem sleepers should also have an ENT exam to see if nose and sinus problems could be playing a role in insomnia. Congestion really torpedoes my sleep. I think it's so interesting how different people are affected by the various dosages and forms of melatonin. For me, 1/2 MG of a sustained release is the only kind that helps my sleep. Others benefit from larger amounts of instant-release melatonin. Tart cherry juice has melatonin and helps some people sleep. It has a weird effect on me, though. Drinking it at night makes me truly sleepy right after I take it, as opposed to my usual tiredness, but then I can't sleep. Although the type I took had no sweeteners or additional ingredients, it may be that the natural sugars from the cherries affected my sleep. I've eradicated almost all sweeteners from my diet except on rare occasions, and I think I can't handle it anymore.