This is a class 2 medical device that measures electrical resistance through the Interstitial fluid of the body. It is like having an ECG done on your heart except on your whole body. The EIS is non invasive, painless and is an extremely valuable tool of assessment. The EIS will give accurate information on the health of your cardiovascular system, diabetic status, neurotransmitter balance, digestive function, hormone balance, electrolytes and body mass analysis. This scanner is used to assess your health when you first come to Horizon Medicine and then to compare back to when you have finished the program.