I am microdosing, 300mcg plain + 300mcg time-release, both from LEF. Currently trying doubling the time-release dosage to see if that works better. More than 400mcg up-front did not work well. In general, people trying melatonin are advised to try microdoses.
In general, people trying melatonin are advised to try microdoses.
That's definitely something I noticed in the anecdotes: people with positive experiences seem to mention switching to 1mg doses and not experimenting.
I'm going to strengthen the language in my melatonin essay dealing with dosage, and add some reminders to myself to do more blind experiments with differing doses when I run out of my current melatonin pill mixes.
Full essay: http://www.gwern.net/Melatonin