I had VERY bad reactions to hair dye. ~Itching and weeping sores. I had tried everything and I still had a bad result till I tried adding Splenda to the dye. I have been using 3 tablespoons and have had no itching, burning or sores. I have been told you can use from 1 to 6 tablespoons without it affecting the color. It's working for me like magic and has not changed the color result! Just thought I'd share.