What Are Common Allergies?
Common food allergies affect millions of people worldwide. By 2050, it is expected that 1 out of 2 people globally will suffer from some form of allergy. The most frequently encountered allergens include dairy, eggs, peanuts, tree nuts, soy, wheat, fish, and shellfish — though reactions can vary widely in severity.
Recognizing symptoms early is essential. Common signs range from mild itching or hives to more serious respiratory issues and, in rare cases, anaphylaxis. Allergy Knowledge provides clear, evidence-based articles to help you identify triggers and navigate everyday situations with confidence.
Dairy Allergy Information
Dairy allergy is one of the most common food allergies, particularly among children. It involves an immune system reaction to proteins found in cow's milk — casein and whey — and is distinct from lactose intolerance, which is a digestive issue rather than an immune response.
Symptoms of a dairy allergy can include skin reactions such as hives or eczema, gastrointestinal distress, and respiratory problems. Because milk proteins appear in many processed foods, careful label reading is an important part of managing this allergy day to day.
Other Common Allergens
Beyond dairy, tree nut allergies — including walnut, cashew, and almond — are widespread. An allergy to one type of tree nut often means others must be avoided, as the proteins that trigger reactions are similar across varieties. Peanuts, though legumes, are another leading cause of severe allergic reactions.
Egg, soy, and wheat allergies also affect a significant portion of the population. Each requires its own management approach, from dietary adjustments to carrying emergency medication when prescribed by a healthcare provider.
