Yeast Allergy Test
Yeast Allergy Test can be requested without a referral, and this overview covers what to expect. A yeast allergy test is a blood test that looks for immune proteins (antibodies) that may react to yeast, most often baker's yeast (Saccharomyces cerevisiae). It is usually ordered when a person has symptoms after eating yeast-containing foods or drinks, such as bread, beer, or wine, and other causes have been ruled out.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
A yeast allergy test is a blood test that looks for immune proteins (antibodies) that may react to yeast, most often baker's yeast (Saccharomyces cerevisiae). It is usually ordered when a person has symptoms after eating yeast-containing foods or drinks, such as bread, beer, or wine, and other causes have been ruled out.
What it measures
- Total IgE — A general measure of allergic-type immune activity; it does not by itself identify yeast.
- Yeast-specific IgE — Antibodies directed at baker's yeast; the main marker used to assess a possible yeast allergy.
- Specific IgE to related molds — Checks for cross-reactivity with molds such as Candida or Aspergillus, which can resemble yeast reactions.
- Specific IgE to wheat or other grains — Helps separate a yeast reaction from a wheat or grain allergy.
- Specific IgE to other foods — May be added to look for additional triggers when symptoms are unclear.
Who it is for
A primary care clinician, allergist, or gastroenterologist typically orders this test after reviewing symptoms and diet history. It is not a routine screening test.
Preparation
No fasting is required. Tell your clinician about antihistamines, steroids, or other medicines, since some can affect antibody results.
Results and what they mean
Results are reported as antibody levels, often with a reference range or class score. A clinician interprets them alongside your symptoms, diet, and other tests, because a positive result alone does not confirm an allergy. This is general information, not medical advice; discuss your results with a qualified clinician.
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 yeast 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
Do I need to fast before this test?
No. Fasting is not required for a yeast allergy blood test.
Can this test prove I have a yeast allergy?
No. It shows whether antibodies are present, but a clinician must combine the result with your symptoms and history to make a diagnosis.
How long until I get results?
Results are usually available in 1 to 3 business days, though timing can vary by lab.
Will I need to change my diet?
Only your clinician can advise on diet changes. Do not remove foods on your own based on a test result alone.