I used the oil for a year and I was excited at the beginning and still am. I can not see that anything has deteriorated, but only that it is the best hair oil I've ever had. Surrender and the tips are very well maintained without being greasy, as it is otherwise often the case. I ombre hair, on the last 15 cm be blond to the hip, the transition to medium brown from the shoulders of black-brown (my natural color) and. So quite pflegebeürftig at the amount of LIGHTENING that was needed and the length. I am thrilled, even after a year of daily use.