Test library
Alfalfa IgE Allergy Test
An alfalfa allergy test measures IgE antibodies against alfalfa, a legume used as animal feed and in some dietary supplements. It can help clarify sensitivity in people with respiratory, seasonal, or food-related symptoms.
Order Alfalfa 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 Alfalfa Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The alfalfa allergy test checks a blood sample for immunoglobulin E antibodies against alfalfa. Alfalfa is a flowering legume grown as forage and sometimes consumed in sprouts, teas, or supplements. Because alfalfa pollen and plant proteins can both be allergenic, testing may be ordered for respiratory symptoms around fields or for reactions after ingestion.
What this test measures
Alfalfa is a perennial plant in the legume family. Its pollen is a minor seasonal allergen, but it can affect people who live or work near fields where it is grown. Alfalfa sprouts and supplements contain plant proteins that may also trigger reactions in sensitive individuals.
The test measures allergen-specific IgE in serum with a quantitative immunoassay. Results are reported as a level and a reactivity class for alfalfa. Because legumes and pollens share some protein families, cross-reactivity with other plants can occur, and clinicians may review results from related tests together.
A positive result indicates sensitization and does not prove that a specific symptom was caused by alfalfa. Clinicians use the result together with a detailed history and examination. Anyone with severe or persistent reactions should consult a qualified healthcare provider.
- Alfalfa-specific IgE antibodies
- Total serum IgE
- Quantitative allergen-specific IgE level
- IgE reactivity class for alfalfa
- Profilin, a cross-reactive plant panallergen
- Lipid transfer protein (LTP) cross-reactive allergens
- Cross-reactive grass and birch pollen allergens
Why people order this test
- Investigate respiratory symptoms around alfalfa fields or hay
- Evaluate reactions after eating alfalfa sprouts or supplements
- Assess sensitization as part of a broader allergy panel
- Look for cross-reactivity with related pollens and legumes
- Provide objective information before discussing avoidance with a provider
How to prepare
No fasting is required. A blood sample is drawn from a vein, usually at the arm. If you take medications that could affect testing choices, mention them to the ordering provider.
Understanding your results
Results are typically reported within one to three business days. The report shows the alfalfa IgE level and reactivity class. An elevated result suggests sensitization; a healthcare provider can interpret it in the context of symptoms and exposure.
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Frequently Asked Questions
What is alfalfa?
Alfalfa is a flowering legume grown mainly as animal feed. Sprouts, teas, and supplements made from alfalfa are also consumed by people.
Can alfalfa cause hay fever symptoms?
Alfalfa pollen can contribute to seasonal symptoms in sensitive people, though it is less common than grass or birch pollen as a trigger.
Does a positive test mean I must avoid alfalfa?
Not necessarily. The result shows sensitization, and a healthcare provider can determine whether avoidance is appropriate based on symptoms and history.
How is the test done?
A blood sample is drawn and tested for IgE antibodies against alfalfa proteins.
Do I need to fast?
Fasting is not required for this test.
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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