I definitely had protein problem. I clarified with Paul Mitchell clarifier and deep conditioned with Nexxus deep conditioning cream for thirty minutes (two days in a row) and it was a miracle. For the longest time, I didn't know I had a protein problem so I'd have to constantly cut dry straw like ends and i couldnt grow long hair. Ever since I cut out products with protein, my hair has been so healthy and LONG. I also have low porosity hair.