Hello....so my sister has just had a Brazilian Blowdry and it looks friggin amazing on her! I'm so jealous! Her hair is so smooth and silky, she's gone from a 4a to a 3c and it's so shiny.

I'm so tempted to try but I'm really worried about any potential damage! Especially since I've previously coloured my hair. I'd love some advice from anyone that's ever had one done! Did it damage your hair in the long term? Is it suitable for colour treated hair?