Yeah Ive gone from blonde to brown a few years ago and it did turn green! I had to get it fixed by a stylist and it was because the brown I picked had ash in it which was the cause. I do plan to go to a professional to be safe.
What exactly does the build up do that's bad? I mean obviously it's bad but what does it cause? Out of curiosity.
By the way, where can I get LA looks? I've heard a lot about it on this site. Bit the KCCC makes my hair crunchy and no clumping at all, like my curls are small and just not good. So is LA looks like that too?