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Beaumont Laboratory

Soybean (Allergen Specific IgE)

Soybean (f14), Antrim #31389, EPIC: LAB5712, SOFT: ESO

Specimen Collection Criteria

Collect: One Gold-top SST tube.

Twenty individual allergen assays or allergen screens can be performed on one 5 mL Gold-top SST tube. Each allergen assay requires 100 mcL of serum.

Physician Office/Drawsite Specimen Preparation

Let specimen clot 30-60 minutes then immediately centrifuge to separate serum from cells. Refrigerate (2-8°C or 36-46°F) the centrifuged collection tube within two hours of collection.

Preparation for Courier Transport

Transport: Centrifuged collection tube, refrigerated (2-8°C or 36-46°F).

Rejection Criteria

  • Plasma specimens.
  • Severely lipemic or hemolyzed specimens.


Specimen Stability for Testing:

Centrifuged SST Tubes and Microtainers® with Separator Gel
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): Unacceptable

Red-top Tubes and Microtainers® without Separator Gel
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable

Serum Specimens (Pour-Overs)
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 1 month

Specimen Storage in Department Prior to Disposal:

Refrigerated (2-8°C or 36-46°F): 7 days


Royal Oak Special Testing Laboratory.


Monday - Friday.
Results available the next business day.

Reference Range

Allergy Reference Range: Less than 0.35 kU/L. 

Range (kU/L) Class Interpretation
Less than or equal to 0.34 0 Negative
0.35-0.69 1 Low
0.70-3.49 2 Medium
3.50-17.49 3 High
17.50-49.99 4 Very High
50.0-100.0 5 Very High
Greater than 100 6 Very High

Test Methodology

Fluorescence Enzyme Immunoassay (FEIA).


The allergen class may not be predictive of clinical disease in some patients. The diagnosis of allergy should be based upon patient history and clinical findings. The diagnosis of allergy should not be based upon laboratory findings alone.

Clinical Utility

Positive assay results indicate a high probability of allergic disease. Negative assay results effectively rule out allergy induced by those allergens.

Clinical Disease

Soybean flour and meal are commonly found in animal feed, infant formula, bakery goods, Chinese cooking, cereals, fillers in meat and candy products, and in certain topical dermatologic products (1).

The primary soybean allergens include 2S, 7S, 11S, and 15S. Cross-reactivity has been demonstrated between soybean allergens. Soybean sensitive persons usually do not produce an allergic reaction to the ingestion of soybean oil, probably because the soy proteins have been removed (2). Patients with soybean allergies are often sensitive to peanut allergens (3).

It is estimated that 25% of milk-sensitive persons will become allergic to soy protein after prolonged exposure to soybean allergens (3).


  1. Patterson, Roy, M.D., C. Raymond Zeiss, Jr., M.D., Leslie Carroll Grammar, M.D., Paul A. Greenberger, M.D. Allergic Diseases: Diagnosis and Management, 4th ed. J.B. Lippincott Company: Philadelphia, 1993, pg. 144.
  2. Metcalfe, Dean D. M.D., Hugh A. Sampson, M.D., Ronald A. Simon, M.D., Food Allergy: Adverse Reactions to Foods and Food Additives. Blackwell Scientific Publications: Boston, 1991, pg. 42-43, 346-347.
  3. Korenblat, Phillip E., M.D. & H. James Wedner, M.D. Allergy: Theory and Practice, 2nd ed. W.B. Saunders Company: Philadelphia, 1992, pg. 518-519.

CPT Code


Test Codes

Antrim #31389, EPIC: LAB5712, SOFT: ESO

Last Updated


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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.