Do you feel uneasy after eating a certain type of food? Does your body react in a bad way every time you eat or drink something specific? Did you know intolerance and sensitivity to food, drinks, and substances are very common in people? There are many types of intolerances like gluten intolerance, lactose intolerance, alcohol sensitivity, and drug intolerance. Intolerance occurs when the metabolic cycle fails to process the substances properly. Your intolerance can cause you discomfort and health problems.