We are constantly surrounded by a large variety of allergies such as pollutants, dust mites, animal dander, and pollen. However, today's major causes of allergies are the food that we eat. The Food Tolerance Test is a test performed to check food and chemical sensitivities. It can test for sensitivity to over 56 different foods. Test results can reveal causes of a variety of diseases, such as psoriasis, migraine, fatigue and many others.