A method and kit for the sequential early introduction to an infant of at least two allergens to decrease the infant's risk for developing allergies, the method involving administering an initial lower, exposure dose of a first allergen for a day or two, followed by administering a higher maintenance dose of the first allergen for several days, followed by administering the maintenance dose of the first allergen and an initial lower, exposure dose of a second allergen for a day or two, followed by administering the higher maintenance dose of the first allergen and a higher maintenance does of the second allergen for several days. The allergens can be provided in powdered protein form in premeasured pouches for addition to baby formula or to mother's milk. Alternatively, the allergens can already be provided in baby formula, or in other foods such as snack bars, cookies, or gels.