A man's head explodes in season 7. Quite graphic.
Not to be mistaken as a kids show as it is much more bloodier than the average 12+ show.
14+ levels of violence.
Usually is mistaken for a kids show as the censored version was shown on kids channels when the uncensored version contains graphic and bloody scenes.
TV-14 levels of violence.
The bulk of DBZ is made of up fights which can contain dismemberment, blowing holes into each other and even death. However, the violence is incredibly fantastical with all of the aforementioned damage incurred by "energy beams" or "ki attacks". Depending on the version shown, there may be blood. However, any such scenes are not dwelt upon for long. Anyone who loses a limb tends to show pain at first but does not really suffer from it.
It gets noticeably more violent with season 3.
Cell, another villain, "sucking" the life from people with his tail. No gore is shown and most of it's off-camera.