Cow’s Milk Protein Immunoglobulin E (IgE) Antibody, Serum

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you or your child show symptoms like hives, itching, swelling, difficulty breathing, or digestive issues after consuming cow’s milk or dairy products. It can also be used to confirm an allergy before starting a milk-free diet or managing symptoms.

What to Expect Before the Test

No special preparation is needed. You may have a simple blood draw from a vein in your arm. If you’re a child, the process is usually quick and done by a trained phlebotomist to keep it as comfortable as possible.

What the Test Results Mean

High IgE levels to cow’s milk may indicate an allergic reaction. However, results alone don’t confirm an allergy; they are often used alongside clinical symptoms and other tests. Your doctor will discuss the results with you and may recommend further steps, such as an elimination diet or skin prick tests.

Common Symptoms of Cow’s Milk Allergy

Symptoms can vary widely and may appear immediately or within a few hours after consuming dairy. Common signs include skin reactions (like rashes or hives), digestive issues (vomiting, diarrhea, or stomach pain), breathing problems (wheezing or trouble breathing), or even anaphylaxis in severe cases.