Switch to a baking soda-water combo for hair that is pH balanced, shiny, and strong. Mix 3 parts baking soda with 1 part water. Apply the paste to the hair and scalp, making sure to cover the strands well. Let it sit for 5 minutes and rinse. You can also add 1 tablespoon of baking soda to your regular shampoo to help keep your hair’s natural pH balance.