You should read what Ray Peat has to say about melatonin and sleep.
Melatonin is a metabolite of tryptophan which is a highly reactive amino acid. Also, I am wondering if they controlled for factors such as diet. Think about police who work night shifts, or nurses or doctors who work night shifts. What do they typically eat? Donuts, cake, etc. I don't know if they controlled for this factor or not though. |