Melatonin is a clock-setting hormone, not a sleep aid, and most of the supplements on the (US) market have waaaaay too high a dose. I get excellent results from 150ug (0.15mg) taken 4 hours before bedtime at the same time every night, and I suffered from delayed sleep phase syndrome for decades before figuring this out.
Dumping an entire bathtub full of melatonin (relatively speaking) into one’s brain leads to more problems than it solves, and it’s not even a very good sleep aid on top of that. Because its actual function is as a clock-setting molecule.
oh, you also got the “can never, ever, ever ‘tune out’ any type of speech sound” autism? it’s currently destroying my life and has been doing so for nearly a decade btw 🥲