The Plain-English Allergy Glossary
Hospital allergy letters and dietetic guidelines are filled with confusing medical acronyms like CMPA, IgE, and protein denaturation. This quick guide breaks them down into plain, stress-free language.
1. Common Medical & NHS Acronyms
An immune reaction to proteins (casein or whey) in cow's milk. Unlike lactose intolerance (which is a digestive sugar issue), CMPA involves the immune system.
IgE: Happens fast (minutes to 2 hours) with hives, swelling, or vomiting.
Non-IgE: Delayed reaction (hours to 72 hours later) causing reflux, eczema flares, or tummy pain/mucous stools.
The UK's official professional body of paediatric dietitians who author the national clinical egg and weaning challenge protocols.
The NHS-endorsed pathway and 4/6-step milk ladder used by GPs, health visitors, and hospital clinics across the UK.
The UK medical association for allergy doctors that sets emergency anaphylaxis and ladder challenge guidelines.
A pre-filled pen used to administer life-saving adrenaline during severe immediate allergic reactions (anaphylaxis).
2. Food Ladder Science & Terms
When milk or egg proteins are baked at high temperatures (180°C+) for 20+ minutes, their 3D shape unfolds ("denatures"). The child's immune system can no longer recognise the allergy triggers, allowing tolerance to build safely.
In Step 1 biscuits, proteins are trapped inside a wheat or rice starch matrix. This physical barrier slows digestion and lowers allergenicity compared to liquid milk or raw egg.
Ensuring that a test food only tests the target allergen. If you are challenging Milk, the food must contain NO active Wheat or Egg so you never wonder which ingredient caused a reaction.
Ovalbumin breaks down easily with baking. Ovomucoid is heat-resistant. This is why children can often tolerate baked egg (Step 1) long before they can eat scrambled eggs (Step 4).