I did not do a double-blinded experiment, so I suppose I can't conclusively rule out a placebo effect. All I can say is that the effect is extremely unsubtle.

I did not do a double-blinded experiment, so I suppose I can't conclusively rule out a placebo effect. All I can say is that the effect is extremely unsubtle. 40mg of melatonin is a lot. It was a bad time in my life when I chose to do that, and I have no intention to repeat the experiment.