It is done in suspected allergies due to certain vegetarian and non-vegetarian food ingredients commonly used for cooking for determining the exact source causing it (allergen). Since it is a food related allergy, it commonly causes gastrointestinal symptoms like diarrhoea, but may even lead to other skin related or respiratory symptoms like: Itching, running nose, sneezing, coughing, shortness of breath, hives etc. Certain severe cases may also lead to anaphylactic shock. Based on these results further specific testing is recommended. Allergy panel test measures the IgE mediated response to 21 common vegetarian and non-vegetarian food ingredients used for cooking. Total IgE levels are also measured. Further tests to a specific allergen will help in further diagnosis.