User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Engorgio/@comment-176.250.227.47-20120526182344

ron says that he thought hagrid had got in the way of an engorgemt charm when he was a kid (when finding out he was a gient) in the goblet of fire. that would suggest that it can be used on humans