I have a rare melatonin deficiency which means I can't get to sleep, so over the years I've tried quite a few different types of melatonin supplements but none seem to work.
I recently found this natural factors product at the local health food store and it has definitely worked the best out of all the melatonin supplements I've tried although it does cost more money at around $20 for 90 tablets that's a bit pricey however in my case it is needed and they do seem to work quite well for me. They make me sleepy within a half hour after use. So if you have a hard time getting to sleep I do highly recommend these