First off I have just reaching my shoulder length hair. Brown and it is pretty thick and i have a little split ends (who doesnt?) Also I straighten my hair every day. My hair is not dead though, on the contrary it is very soft and shiny because I take good care of it. This is pretty expensive stuff and I only bought this when I bought my Rehab shampoo because I was recommended it. No, just no. Does not do anything, and it isnt even moisturize my hair that well. Also it runs out very fast and you need A LOT or product to get it to moisturize your hair. Now I read some reviews that this smelled like lemons. I LOVE lemons. I eat lemons, love lemon flavors, and love lemon scented/flavored products. This does not smell like lemons. I don't enjoy the smell that much. The rehab smells sooo much better (although it is drying) If you want to give it a shot, get a sample first!