Introducing foods with allergenic potential early/ exposure to allergens early in life can help prevent the development of allergies. However if allergies are present, tolerance can be developed by giving the patients small escalating exposures to the allergen. The field has moved from SQ exposures to the use of oral tablets. Most patients are treated with allergenic extracts. Not sure of peptides. This would be hard esp. when you don't know the exact protein/peptide that is responsible for the allergy. Most allergy patients respond to multiple proteins in the same allergen, although to varying extent.