Don't believe the melatonin hype

You can find anecdote attesting to anything, and I'm moderately confident (not bothering to look it up again) that the peer-reviewed research doesn't show anything remotely close to those kind of effects.

I've personally consumed way more in larger varieties and quantities than anybody you'll ever meet, yet it has done nothing seemingly deleterious

A rule of thumb: if popular publications say a lot of something, they're probably wrong. Also, if melatonin really were that powerful, look to it being prescription, illegal, etc.