My hair has never been curlier since I started using baking soda to wash my hair. Have been doing this for 3 weeks and since I don't have oily hair, this was not a problem. I did notice that my grey hair was turning slightly yellow. I used blue sugar, the type used for decorating cakes and cookies, to scrub my hair after using BS. Now my hair is back to its silver. Didn't use apple cider vinegar this time. Since the ACV i use is unfiltered, I'm going to see if using the clearer vinegar that rises to the top will help avoid the yellowing,since I have 2 full bottles of the ACV. Has anyone out there used anything else to diminish the yellowing? If this doesn't work will try white vinegar like someone else mentioned on the blogh. Would mashed up blueberries be too way out there?