Well kinesiologists used to use real substances for tesing, often placing the items like foods on the tongue and then muscle testing to see if the muscle stays locked or if it unlocked and gets weak. I use homeopathically made test vials..or energetic kits instead of the real sustances. MAny a chiropractor also use NAET style test vials..they vary in the way that the water is charged with the energetic frequency. The ones I use were recommended by Michael Lebowitz D.C. in Colorado. They are made in the U.K. The testing methods I use are CRA, PKP, AK, and a combo of my own discoveries along with my mentor's. I use mostly Thorne products because they muscle test so darn good.