Quiz
2
Order
3
Lab
4
Results
5
Report
6
Plan

Allergy

Allergy Test – Soybean

Allergy

Allergy Test – Soybean

This blood test measures IgE antibodies against soy proteins to determine whether your immune system reacts allergically to soy.

275 SEK

VAT-exempt medical service

  • Results in 5 working days
  • 116 sampling locations
  • No doctor's referral needed
  • Sample: Blood (venous)
  • Laboratory: Synlab
Find a sampling location →

What does this test measure?

Soy is a common ingredient in many processed foods, meat substitutes, dairy alternatives, sauces, and ready meals. A soy allergy occurs when the immune system reacts to proteins in soybeans, triggering symptoms that range from mild skin issues to serious allergic reactions. This IgE blood test helps confirm or rule out a soy allergy and guides dietary management.

This test is recommended if you experience symptoms after eating soy-containing foods such as tofu, soy milk, or processed products. It is also useful for assessing cross-reactions, as soy is related to other legumes like peanuts and lentils, and for getting clear guidance on how to manage a suspected soy allergy.

What a high value can mean

Elevated IgE levels suggest a likely soy allergy. You may need to avoid foods containing soy and get dietary advice from a healthcare professional. Cross-reactivity with other legumes should also be considered.

What a low value can mean

Low or undetectable IgE levels make a soy allergy less likely but do not completely rule it out. If symptoms persist, further evaluation is recommended.

Read more about this marker →

Associated symptoms

  • Hives, itching, or skin rashes
  • Swelling of the face, lips, or throat
  • Stomach pain, bloating, or diarrhoea
  • Nausea or vomiting
  • Nasal congestion or breathing difficulties
  • Eczema flare-ups after soy consumption

Who should consider this test

  • People who experience symptoms after eating soy products
  • Children with suspected food allergies
  • Individuals with known legume allergies who want to check for soy cross-reactivity
  • Those looking for dietary guidance on soy avoidance

Before your appointment

No special preparation is required. No fasting needed. Bring your ID to the sampling location. Bring valid ID to your appointment.

  • Bring photo ID to the sampling location.
  • You do not need a doctor's referral — your referral is issued when you order.
  • Tell the staff which test you have ordered if they ask.

How it works

  1. 1

    Order your test

    Choose your test and pay online. Your lab referral is created straight away.

  2. 2

    Give your sample

    Visit any of our partner sampling locations. No appointment needed at most of them.

  3. 3

    The lab analyses it

    Your sample is analysed at an accredited Swedish laboratory.

  4. 4

    Get your results

    Your values appear in your account with reference ranges and an explanation of each marker.

Good to know

Is soy allergy common?

Soy allergy is more common in children and is often outgrown by adolescence. However, it can persist into adulthood and should be monitored.

If I am allergic to soy, should I avoid all legumes?

Not necessarily. Although cross-reactivity between soy and other legumes like peanuts exists, many people with soy allergy can tolerate other legumes. Individual testing is recommended.

Is soy lecithin safe for people with soy allergy?

Soy lecithin contains very little soy protein and is generally tolerated by most people with soy allergy. However, individuals with severe sensitivity should consult their doctor.