Yes ! With time, patience and the right products damaged hair can improve. My hair was a highlighted / colored damaged mess in October / November 2004. I took over control of my hair in early November. I found hair boards in December 2004. Now my hair is vibrant, thick, shiny healthy and has crazy volume. Depending on what type of damaged hair it is, (jojoba oil) hot oil treatments, carrot oil or olive oil for strength , deep conditioning, babying your hair and a daily moisturizer can start healthy hair back on its way. For me it took me about 7 months and 2 "trims" to get it where it is now. I did not give up... there is hope for damaged hair. I followed dontspeakdefeat's information for newcomer's and I took note of Lorraine & Sylver 2's regimen. Keep working towards your goal---
also I want to add sometimes what our hair needs is strength and products that fortify. A key product in my regimen was Biolage Fortifying Leave-In Treatment (wet formula). I also took time to find a good fortifying / strengthening shampoo that I use before I lather up with my moisturizing shampoo.