This is used to assess the complete functional status of gastrointestinal tract, from digestion and absorption to the integrity functional analysis of immune barrier. Through stool analysis of personal food digestion capacity, intestinal absorption efficiency, microbial flora ecology as well as detection of intestinal infections, celiac disease / gluten allergy and inflammation, helping physicians on clinical diagnosis for effective treatment. The function of intestinal wall barrier is analyzed using urine / stool samples, it can be immediately away from the threat of intestinal leakage syndrome. It also provides breath detection to analyze the growth of intestinal microbes to avoid the deterioration of SIBO that will affect health.