I decided to try this shampoo after finding out my coworker uses it- her hair is always a vibrant red. I've been dying my hair red for 5 years, I've tried every color shampoo out there and my hair always faded within a week. Its been a month since I dyed my hair and the color has barely faded. Doesn't make my hair super greasy like other color shampoos either. 10/10 recommend.