I don't know about specific shampoo bars, but with funds being low here, I've been using my castile soap on my hair and omg it's wonderful. It's not all that bubbly but it cleans gently and isn't leaving my hair limp at all. I have thick coarse hair, color treated and prone to split ends. Just for the heck of it, today I used my regular conditioning shampoo and my hair looked aweful compared to what it had looked like. The castile doesn't really feel like it's bubbling hair clean, but it's cleaning it, I can tell. It also makes my hair feel much softer and that's what I look for in a shampoo. After regular shampoo use today and seeing how yukky it left my hair compared to the castile, tomorrow I'm going right back to my castile. Oh and with just the castile, I can run my fingers through my hair without conditioner which I wouldn't be able to do if I dared to use store bought soap on it. My hair would be a matted mess since it's mid length and layered.