What happens if I use lightening gel on color-treated hair?

Question

I got a bottle of La Bella lightening gel. It's sort of like Sun-In, I suppose, but not as damaging or as extreme, and it works on all hair colors, not just light brown/blonde. It says on the back not to use it on color-treated hair, but it also says not to use on african-american hair and I know a girl who did, and got great results, and she was black. I have color-treated hair and I was wondering what would happen if I used this gel.

Answer 1

test some on a strand of your hair, and see what happens, if the results are positive you can continue to use it all over your hair. By the way, where did you buy this lightening gel? Im interested to buy some myself.