Hilary, Kaikohe.

I washed my hair with baking soda for a few times before I wondered how much good it was doing my hair, since I also use baking soda to clean my oven. I did some research and found others had had the same thought. One lady had done some scientific research and found that rye flour has the best pH for hair. I have been using two heaped tsp of rye flour shaken up into a small amount water ever since. It works extremely well. Sometimes I use apple cider vinegar afterwards, but often not.