Huh. So how exactly does your mentality revert? [ Good thing Homunculi are created as-is, and never age. With the exception of manga!Wrath. ]

Try talkin' to an Alchemist, they're pretty damn good with the whole chemistry bit. If it is somethin' in the water and it's still there, they'd be able to figure it out.

Edward Elric'd be your best bet, if it's possible, anyway. [ Luckily, Greed had no problems with the kid, and didn't want to use him as some sacrificial lamb. Therefore, he had no problems with suggesting the talented little half-pint. ]