I was interested in Melatonin and looked it up... the info I saw on various websites seems to say that it is an artificial hormone

There are several sites which enable us to by the product in the UK ... However I have also found this article from the BBC:

http://news.bbc.co.uk/1/hi/health/3354147.stm

which gives some info about its use.
Of particular interest is that the product is "off licence" in the UK- There are some contra indications found in this article....

I am not saying dont take it or do take it - just thought while ai had time on my hands Id read about it - hope its of some use to someone???