Understanding Lab Tests for Whey Protein Allergy
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Whey protein allergy is an immune system reaction to whey protein, one of the main proteins found in milk and dairy products. Unlike lactose intolerance, which involves difficulty digesting milk sugar, a whey protein allergy involves the immune system mistakenly identifying whey protein as harmful and mounting a defense against it.
Recommended Test
Whey (f236) IgG
This test measures the levels of IgG antibodies specifically directed against whey protein in your blood. Elevated levels of these antibodies indicate that your immune system has been exposed to and is reacting to whey protein, suggesting a potential allergy. This specific test helps differentiate whey protein allergy from other dairy-related issues and can guide dietary elimination strategies.
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Diagnosing Whey Protein Allergy
Symptoms of whey protein allergy can range from mild digestive discomfort to more severe reactions like hives, swelling, or respiratory issues. Because these symptoms can overlap with other food allergies or intolerances, specific blood testing is essential to identify whether whey protein is the trigger and to guide appropriate dietary modifications.
Understanding Your Results
High levels of whey-specific IgG antibodies suggest your immune system is mounting a response to whey protein. This information can help you and your healthcare provider develop an appropriate management plan, which typically involves avoiding whey protein-containing foods and products.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. If you experience severe allergic reactions, seek immediate medical attention.
