This is a little secret that will save your hair. Unflavored gelatin (IT HAS TO BE UNFLAVORED), make the gelatin but do not let it harden completely, place it all over your hair and wrap it with kitchen paper, let it rest for 20 minutes (do not leave it for much longer) and then wash your hair. Because of all the collagen it will be almost like new, good to prevent it from breaking when bleaching.