This guideline covers assessing and managing food allergy in children and young people under 19. It aims to improve symptoms such as faltering growth and eczema by offering advice on how to identify food allergy and when to refer to secondary or specialist care. The guideline does not cover reactions to food that are due to intolerance (for example, intolerance to lactose in dairy products) rather than allergy. NICE has also produced diagnostics guidance on ImmunoCAP ISAC 112 and Microtest for multiplex allergen testing.