On the surface, I appear like any other ordinary apple, but in fact I am an artificial apple made by a celebrated philosopher. I am able to cure all sick persons of mortal diseases—indeed, if the patient is dying, I will immediately restore said person to perfect health.

How is this done? In the easiest way imaginable. Smell me! 

The All-Healing Apple in Prince Ahmed and the Fairy Paribandou, Blue Fairy Book. Painting by Charles Victor Thirion.