Alpha-Lactalbumin Allergy Test
Alpha-Lactalbumin Allergy Test can be requested without a referral, and this overview covers what to expect. The alpha-lactalbumin allergy test is a blood test that looks for an immune response to alpha-lactalbumin, a protein found in cow's milk and other mammalian milks. It is usually ordered when a person has symptoms after drinking milk or eating dairy, such as hives, stomach upset, or breathing trouble, and a milk allergy is being considered.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
The alpha-lactalbumin allergy test is a blood test that looks for an immune response to alpha-lactalbumin, a protein found in cow's milk and other mammalian milks. It is usually ordered when a person has symptoms after drinking milk or eating dairy, such as hives, stomach upset, or breathing trouble, and a milk allergy is being considered.
What it measures
- Alpha-lactalbumin-specific IgE — The main marker; IgE is an antibody linked to allergic reactions.
- Total IgE — Sometimes measured to give overall context, though it cannot confirm a specific allergy.
- Other milk proteins (optional) — Tests may also check casein, beta-lactoglobulin, or lactoferrin to compare reactions.
- Serum collection — A blood sample is drawn from a vein and sent to the lab.
Who it is for
A doctor, allergist, or pediatrician typically orders this test after reviewing symptoms and history. It is common in infants, children, and adults suspected of milk allergy.
Preparation
No fasting or special preparation is required. Tell your clinician about any medicines you take, because some drugs can affect test results.
Results and what they mean
Results are reported as a level of specific IgE, often with a reference range or class. A clinician interprets the number alongside your symptoms and history, since a positive result alone does not prove an allergy. This is general information, not medical advice; discuss your results with a qualified healthcare professional.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the alpha-lactalbumin allergy test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Does this test require fasting?
No. You can eat and drink normally before the blood draw.
Is a positive result the same as a milk allergy?
Not always. Some people have positive IgE without symptoms, so a clinician must interpret the result with your history.
How long do results take?
Typical turnaround is 1 to 3 business days, though it can vary by lab.
Can this test show if my child outgrew a milk allergy?
It may be repeated over time, but only a clinician can decide what changes in the level mean for your child.