Inclusion:1. Age 4–26 years2. History of peanut allergy3. IgE ≥0.35KUA or SPT ≥3 mm in past 12 months4. DBPCFC+ at or before 100 mg single dose peanut protein (143 mg cum) (PRACTALL guidelines)Exclusion:1. Hx of CVD2. Frequent or life threatening anaphylaxis, 3. Eosinophilic gastrointestinal disease, 3. On other intervention4. Other chronic illness—(except asthma, eczema, rhinitis)5. Severe or uncontrolled asthma6. Use of specific medications. The gene discussed is IGHE; the disease is rhinitis.