Dr.Clark in her lastest book and in her ordering products recomends this at a 5% DILLUTION. BUT let me agree with you 1st, I did try her HCL (hydrocloric acid) sterilising food and drink method for 2 weeks and in that time YES my teeth were starting to dissolve even small chunks would split off. I'm not crazy I was just Trying to sterilize my food as she recomends.