I don't think it can lighten hair, but it is supposed to bring out the red in red hair (red vinegar, not white).
It can be a bit harsh, so I would say don't do it all the time.
FYI: It also stops lice, not that this is probably a concern fo ryou.
But, if you work with little kids like in a school or something, regular vinegar rinses will stop the lice from being able to put eggs on your hair.
long and layered
NEW to going wavy/curly!