Melatonin is a naturally occurring bioregulatory molecule which is inexpensive and freely available as an over the counter “nutrient.”

...

What kind of black irony is it that I live in terror of stroke and cardiac arrest (for both myself and my loved ones) and yet the very molecules I discovered to combat them are as unavailable as if they had never been found?

Huh? What am I missing here? I take melatonin all the time, it's far from "unavailable".