I didn't notice much of a difference in my hair after using this, I think it is because my hair is not damaged. This is very expensive, $16 at Walgreens. What I did was clarify then put this on & left it on for 20 mins. Rinsed out then shampooed, then deep conditioned with a cone free deep conditioner, left on for 1 hour. I will continue using once every 2 weeks to see if I see a difference.
Edit: I had to use this over time to see the benefits. My hair is so much more healthy since adding protein. This really helps strengthen my hair & protect from breakage & split ends. Will continue to use every 2 weeks.