What I'm saying is something in the pill or spray is reacting with your body. Not Melatonin. Melatonin is used to for ATP hydrolysis to take place or food for your cells. You couldn't live without it.
Simply find foods that is high in melatonin. You should have about 10 mg a day. You can estimate how much food that will take.
Melatonin is the bases to avoid all forms of cancer.
Because it's the mitochondria what tells cells to die. If your mitochondria is healthy you will not get cancer.
I think I shown you this video before:
Melatonin - sleep cycles Russel J. Reiter
https://www.youtube.com/watch?v=I7YIRqTNmuY&t=1s
I just tried the bulk powder, no ingredients in it but Melatonin.
Seriously, I must have very strange body chemistry as I react badly to all kinds of things hardly anyone does.