 What is the difference between a food allergy and food intolerance? If you're experiencing unpleasant symptoms every time you eat, you might be wondering if one of these conditions is the cause of your suffering. To help us differentiate between the two, let's take a side-by-side comparison in this short food allergy versus food intolerance video to determine the most important differences. To begin, a food allergy involves your immune system. A food intolerance involves your digestive tract. With a food allergy, any amount, even trace amounts, can cause an allergic reaction. With a food intolerance, the reaction varies from person to person and the amount consumed. Food allergy symptoms are immediate and may include skin hives, diarrhea, vomiting, and anaphylaxis. Food intolerance symptoms are gradual and may include diarrhea, joint pain, tiredness, weight gain, and feeling bloated. Food allergy example includes peanut allergy. Food intolerance example includes lactose intolerance. If you have any questions about food allergies or food intolerances, please call, visit, or email the Professional Supplement Center and one of our knowledgeable staff members will be happy to assist you.