I can only describe your article on Melatonin as fear-mongering. Melatonin is not just an
animal hormone as you suggest. It is present to some degree in virtually all plants and is an essential part of their life processes.
But, like a lot of other organic chemicals it can be synthesized more easily than it can be extracted. So commercially that's what we get.
I do not believe in Melatonin addiction. Nor do I believe in any sort of Melatonin toxicity.
Due to a brain condition, I had severe chronic insomnia for 17 years before I finally got surgery to correct the underlying problem.
I tried all sorts of sleep-aids before finding Melatonin. When I did find it, although my other symptoms continued to worsen as my brain condition degenerated, at least my insomnia was no longer a problem.
I took Melatonin every night for 15 years. Then when why condition was corrected by surgery, I stopped taking Melatonin from one day to the next. I had no withdrawal, no sleeplessness, no toxicity, no problems. Melatonin is the most natural sleep aid that exists. Safer than Valerian, better than Passion Flower, more dependable than Kava-kava, etc. etc.
Of course, like all natural remedies, the drug/medical industry would like to ban it and push their patented chemicals instead.