I did when my hair was bleached. It helped a little, which was more than anything else I tried. Mind you I ended up cutting the hair off because it literally was like straw.... Never doing that again. So, I guess it would be good for regular hair (not dyed I mean) or non straw like hair lol. However, I'm so grossed out by the thought that I won't do it again. I only did it because I was desparate. It was the funniest thing to watch me putting it in... the whole time i was like ew ew ew ew ew ew and I freaked when it touched my skin (I was only putting it on the ends of my hair where the bleach was applied) lmao