Huh, it says that it cures any curses or magical effects but if she was cursed by something wouldn't it have shown up in his appraisal skill? Obviously she's been cursed for a while since she caused the explosion trying to make it herself, so unless they are literally just calling old age a curse it's a bit of an odd way to make her young again.
Either that or they'll pull the ol' "skill too low" to identify that she was cursed.