Do you have recurring skin allergies for which the cause is still unclear? Do you often feel bloated, even when you haven’t eaten much? Do you suffer from abdominal pain, diarrhea or constipation? Do you periodically feel that your mind is not working throughout the day? Do you have problems with excessive mood swings? Do you feel unusually tired? If you answered yes to at least two of these symptoms, it means that you probably have an “intolerance” to one or more foods. Food intolerance refers to a complex metabolic disease in which the human immune system treats one or more foods that enter the body as harmful substances, thus generating an excessive protective immune response against these substances and producing food-specific IgG antibodies, which form immune complexes with food particles (type III metabolic reaction) and can cause inflammatory reactions in all tissues (including blood vessels), and This can cause inflammatory reactions in all tissues (including blood vessels) and manifest as symptoms and diseases in all systems of the body. Food intolerance and food allergy are fundamentally different from each other. Food allergy is generally mediated by IgE and is a type I allergic reaction, characterized by rapid onset and quick relief of symptoms after treatment with medication. Food intolerance, on the other hand, is mediated by IgG and belongs to type III allergic reactions, which are characterized by slow onset, easy to be ignored or rarely have effective detection means, and the symptoms can be relieved or eliminated by avoiding intolerant foods. Natural foods are each rich in nutrients, but because each person’s constitution is different, some constitutions may react incorrectly to certain foods, thus triggering food allergies and food intolerances, and food intolerances are particularly insidious and likely to be overlooked by us. The range of symptoms is extremely broad and is not limited to gastrointestinal discomfort, but even affects mental state and thinking ability. The incidence of food intolerance is very high, and it is estimated that more than half of the population is intolerant to one or more foods. However, because of its slow pathogenic process and long-term chronic symptoms, it is rarely detected or misdiagnosed and requires attention. Food intolerance testing is recommended for people with the following symptoms and diseases: 1. mouth ulcers, migraines, headaches, and dark circles under the eyes. 2.Tinnitus, deafness, vertigo, oozing otitis media. 3, allergic rhinitis, allergic sinusitis, nasal polyps. 4.Dermatitis, eczema, urticaria, itchy skin, acne, allergic purpura, perianal eczema. 5, unexplained diarrhea, abdominal pain, chronic indigestion, irritable bowel syndrome, ulcerative colitis. 6.Itchy throat, dry cough, allergic asthma. 7, chronic fatigue syndrome, arthritis, hyperactivity in children, etc.