Allergies are abnormal reactions to a food, particle such as dust, chemical, drug, or other substance. They range from mild and occasional to chronic and life-threatening. About 6% of school-aged children in Europe, America, and other industrialized societies suffer from this condition. Allergies are commonly classified as food allergies; chemical allergies; drug allergies; atopy; asthma, hay fever, and other respiratory allergies; insect bites; and hives and other skin allergies.
Dust, pollen, and other substances may trigger allergic reactions, but in many cases overall dietary imbalance contributes to sneezing, congestion, or other individual symptoms. Dietary change will help eliminate reactions to foods, drugs, chemicals, or environmental irritants. As scientific and medical researchers in Europe and America are increasingly finding, cow's milk and other milk products are the principal food that triggers allergic reactions, and removal of dairy from the diet often helps to eliminate symptoms and susceptibility to future attack and reaction.