Bulma, Vegeta and others in “Unfinished Business”

Vegeta, you don't look that different. Why didn't your hair grow at all?

Vegeta

Uh...for your information, a pure Saiyan's hair does not change from the day that he is born.

Oh...

Is that true...how 'bout that!

I guess that's why you've never needed a haircut.

Hey yeah. But I wish I could do something about these split ends. Ha ha ha.

Try shampoo.

Vegeta

I don't have time to listen to Kakarot's hair problems.