One family. Food intolerance testing is to detect the level of specific immunoglobulin G antibodies in human serum and determine whether there is food intolerance based on the test results. It was found that Tianjin Lizkar Hospital provides 90 food intolerance tests, which can identify the real causes of chronic diseases from the source. Food intolerance is an abnormality in which the human immune system treats one or more foods that enter the human body as harmful substances, produces food-specific IgG antibodies, and forms immune complexes, which in turn causes inflammatory reactions in tissues throughout the body and manifests as various symptoms. Reactive disease.