Has sincerely restored my hair after 1 application. Without exaggerating, this is definitely my number 1 hair mask ever. Leave it on for 15 minutes and wash it out thoroughly. I then used conditioner olaplex no. 5. Really perfect combo. I have a huge problem with hair loss. My hair feels extremely saggy, healthy and already looks a lot fuller. It also really restored my curls. Didn't expect all of this, but really, if you're unsure, go for it. I wonder how good the results will be in the long term...