Human transformations in Dragon Ball?

A number of species in the Dragon Ball universe can transform, especially Saiyans as we all know. My question is, do humans have any access to any such transformations of their own?

Originally posted by Interneton
A number of species in the Dragon Ball universe can transform, especially Saiyans as we all know. My question is, do humans have any access to any such transformations of their own?

Roshi has his ultra muscular form. Tien is able to sprout hands from his back. Videl is capable of going pregnant saiyan.

The closest thing to a complete human transformation would be Roshi bulking up, me thinks.

There doesn't seem to be any innate transformation, no. Not even Uub has one.

That said, having one would be a nice way to let a human character *catch up* for a change!