Cow’s Milk IgG Immunoassay (Serum)

What Does This Test Measure?

IgG is a type of antibody your immune system makes to fight off infections and foreign substances, including proteins from cow’s milk. This test specifically looks for IgG antibodies that your body creates in response to cow’s milk proteins. These antibodies can indicate a possible allergy or sensitivity, though they are not always a definitive sign of an allergy.

Why Might You Need This Test?

Your healthcare provider may recommend this test if you have symptoms like hives, digestive issues, or other reactions after consuming cow’s milk, or if you’re considering a food elimination diet. It can help determine whether cow’s milk proteins trigger an immune response in your body.

How Is the Test Performed?

A blood sample is taken from a vein in your arm. The sample is then sent to a lab where it is analyzed using an immunoassay method to detect cow’s milk-specific IgG antibodies. The process is quick and typically requires minimal discomfort.

What Are Possible Results?

Results are qualitative (positive or negative) and indicate the presence or absence of cow’s milk-specific IgG antibodies. A positive result suggests your body has produced these antibodies, which may mean you have an immune response to cow’s milk proteins. However, this does not always mean you have an allergy—it could also indicate a tolerance or exposure.