Pectin Intervention Study and Long-term Follow-up in Lipid Transfer Proteins Allergic Patients

Inclusion Criteria: * Adults with a clear clinical history of food allergy after eating peach (oral allergy syndrome and/or systemic symptoms) and with or without clinical history of food allergy with peanut. * Sensitization to Pru p 3 by positive skin prick test (SPT wheal area \>7 mm2) and specific IgE (sIgE \>0.35 kUA/L) * Positive DBPCFC with peach juice. * If clinical history of food allergy with peanut, sensitization must be confirmed by positive SPT to peanut and sIgE \>0.35 kUA/L to Ara h 9 and clinical reactivity through a positive DBPCFC with peanut. * Signed informed consent. Exclusion Criteria: * Food allergy to corn. * Food allergy to peanut due to sensitization to storage proteins. * Previous/active treatment with sublingual immunotherapy to Pru p 3. * Pregnancy/lactation. * Active infections. * Inflammatory, autoimmune, and/or oncological diseases. * Severe immunodeficiency. * Metabolic syndrome. * Increased liver parameters and/or any liver disease. * Alcohol disorder. * Mental illness. * Mast cell activation syndrome. * Severe atopic dermatitis. * FEV1 \< 70% * Treatment with immunomodulators in the last five years. * Vitamin supplements, probiotics, prebiotics, antibiotics, metformin, statins, proton pump inhibitors, or corticosteroids in the last three months. * Any clinical condition contraindicating performance of DBPCFC.