I printed PLA at 185 deg, too much high temperation not good for PLA, since PLA is of bad heat stable(why? you can compare PLA with ABS, keep both on high temperation higher than 250 deg for a while, PLA wil flow out from nozzle without motor drive), when temperation up to 250 deg, it mostly go degradable(PLA is a biodegradable corn plastic),something very unknow fume emmit, and you may find the PLA filament melting flow from nozzle "dirty yellow black", I think that nothing good for health.
different supplier PLA is different process temperation, my do is 185 deg,very safe.
anyway, I don't like the smell of ABS, make me headache,must be in ventilation environment.