Health Risk Appraisal System ( HRA) is a disease risk evaluation device. HRA can detect over 220 electrical impedance values in 9 major systems of the human body, including organs, biochemistry, neurotransmitters, electrolytes, blood gas, blood oxygen situation, free radicals, hormone level etc. The results of the conventional physical examination can only tell us whether we are ill or not, while our HRA device will not only tell us whether we are ill or not, but also remind us which disease risks our body is susceptible to and how serious the risks are. Such as risk for cardiovascular disease Risk for respiratory system disease Risk for Digestive system disease, such as Liver,gastrointestinal tract etc Risk for Diabetes Risk for urinary and reproductive system disease, such as kidney injury Risk for skeletons problems Risk for nervous system disease