Test library
Alpha-Lactalbumin IgE Blood Test
The Alpha-Lactalbumin Allergy Test measures IgE antibodies against alpha-lactalbumin, a whey protein found in milk, in a blood sample. It helps evaluate a suspected milk allergy and distinguish among individual milk proteins.
Order Alpha-Lactalbumin Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Alpha-Lactalbumin Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Alpha-Lactalbumin Allergy Test is a blood test that measures immunoglobulin E antibodies against alpha-lactalbumin, one of the main whey proteins in milk. It is used when a milk allergy is suspected, when symptoms appear after consuming dairy, or when a clinician wants to identify which specific milk protein is involved. The test requires only a blood draw, and results are interpreted alongside symptoms and history by a qualified healthcare provider.
What this test measures
Cow's milk contains casein proteins and whey proteins, and alpha-lactalbumin is one of the major whey components. Allergy blood testing measures specific IgE antibodies that recognize individual milk proteins. Testing a single protein such as alpha-lactalbumin can help clarify which component is driving symptoms, especially when reactions to dairy are inconsistent or unclear.
The sample is a standard blood draw. The laboratory reports alpha-lactalbumin-specific IgE, and some panels also include total IgE, casein, beta-lactoglobulin, and other milk components. Results from component testing can help distinguish milk allergy from lactose intolerance, which is a different condition involving digestion rather than the immune system.
This test is usually ordered for people with suspected milk allergy, particularly when symptoms such as hives, eczema, stomach upset, or breathing changes follow dairy consumption. It may also be used to guide dietary decisions with a clinician. As with all allergy tests, the result is interpreted together with history and examination rather than on its own.
- Alpha-lactalbumin-specific IgE antibody
- Total serum IgE
- Beta-lactoglobulin (whey) component
- Casein (Bos d 8) component
- Cow's milk allergen panel
- Cross-reactive carbohydrate determinants (CCD)
- Bovine serum albumin (Bos d 6) component
Why people order this test
- Investigate a suspected allergy to cow's milk or dairy products
- Identify which specific milk protein triggers symptoms
- Distinguish milk allergy from lactose intolerance
- Follow up on a positive milk allergy screen
- Assess cross-reactivity with milk from other mammals
- Support dietary planning with a qualified healthcare provider
How to prepare
No fasting is required. The test uses a single blood sample collected at a laboratory, and no special timing applies. Tell the laboratory about any medications and about recent reactions so the result can be interpreted accurately.
Understanding your results
Results are typically available within one to three business days. The report shows whether alpha-lactalbumin-specific IgE was detected and at what level class. A qualified healthcare provider can explain how the result relates to your symptoms and whether other milk components should be considered.
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Frequently Asked Questions
Is alpha-lactalbumin allergy the same as lactose intolerance?
No. Lactose intolerance is a digestive issue with milk sugar, while alpha-lactalbumin allergy involves the immune system reacting to a milk protein.
Can adults develop a milk protein allergy?
Milk allergy is most common in children, but adults can also react. Testing helps determine whether a milk protein is involved.
Why test individual milk proteins instead of whole milk?
Component tests can show which protein is responsible and help assess cross-reactivity or the likelihood that a reaction will persist.
Does the test require avoiding milk beforehand?
No. The test measures antibodies already present in blood, so no dietary changes are needed before the draw.
Can goat's milk or sheep's milk trigger the same reaction?
Milk proteins from different mammals can be similar, so cross-reactivity is possible. Component results can help a clinician assess this.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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