Although sensitivity levels vary by country, the most common food allergies are allergies to milk, eggs, peanuts, tree nuts, seafood, shellfish, soy and wheat.[16] [clarification needed] These are often referred to as "the big eight."[17] Allergies to seeds — especially sesame — seem to be increasing in many countries.[18] An example an allergy more common to a particular region is that to rice in East Asia where rice forms a large part of the diet.[19]