IGHE and anaphylaxis: 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