What Is Cilantro Allergy?
Cilantro allergy (also known as coriander allergy) occurs when the immune system identifies the proteins in the leaves or seeds of the Coriandrum sativum plant as harmful. While cilantro is a staple in Mexican, Asian, and Middle Eastern cuisines, it can trigger allergic reactions in sensitive individuals.
It is important to distinguish between a cilantro allergy and the common genetic trait that makes cilantro taste like soap. The latter is caused by a variation in olfactory receptor genes (OR6A2) and is not an allergy. A true cilantro allergy involves an immune system response that affects the skin, respiratory system, or digestive tract.
Cilantro is part of the Apiaceae (Umbelliferae) family. If you are allergic to cilantro, you may experience cross-reactivity with other members of this family, known as the Celery-Mugwort-Spice Syndrome.
Individuals with a cilantro allergy may also react to:
- Celery
- Carrots
- Fennel
- Caraway
- Anise
- Cumin
- Dill
Cilantro Allergy Symptoms
Symptoms of a cilantro allergy can range from mild oral irritation to systemic distress. Common symptoms include:
- Oral Allergy Syndrome: Itching, tingling, or swelling of the lips, tongue, or throat.
- Skin Reactions: Contact dermatitis (rash or hives) from touching the leaves or stems.
- Respiratory Issues: Sneezing, itchy eyes, or coughing (often triggered by the aroma or spice dust).
- Gastrointestinal Distress: Stomach cramps, nausea, vomiting, or diarrhea.
- Anaphylaxis: Although rare, severe cases can lead to a sudden drop in blood pressure and difficulty breathing.
Cilantro Allergy Diagnosis
At NY Allergy & Sinus Centers, we use a combination of methods to diagnose a cilantro or spice allergy:
We place a small amount of concentrated cilantro allergen on the skin and observe for a reaction. Because spice extracts can sometimes be less stable, our allergists may use a “prick-to-prick” test with fresh cilantro for more accurate results.
This test checks for the presence of specific IgE antibodies in your blood. It is particularly useful if you have an underlying skin condition that prevents skin testing.
Food Challenge
If results are inconclusive, an oral food challenge may be performed in our clinical environment. This involves consuming a small amount of the herb under strict medical supervision to monitor for a reaction.
Cilantro Allergy Treatment
The most effective treatment is the strict avoidance of cilantro and coriander seeds. This can be challenging as cilantro is often used as a garnish or finely chopped into salsas and sauces.
- Manage Mild Symptoms: Over-the-counter or prescription antihistamines can help soothe itching, hives, or hay fever-like symptoms.
- Emergency Preparedness: If you have been diagnosed with a severe cilantro allergy, our doctors will prescribe an epinephrine auto-injector (such as an EpiPen). You should carry this at all times, especially when dining out.
If you suspect you are allergic to cilantro or other spices, our NYC specialists can help you navigate your diet safely. Book an appointment online or call (212) 686-6321.
Cilantro Allergy Frequently Asked Questions
Is Cilantro Allergy the same as the “Soapy Taste” Trait?
No. Many people have a genetic variation that makes cilantro taste like soap, but this is a sensory preference, not an immune response. An allergy involves symptoms like hives, swelling, or digestive upset.
Can I be allergic to Cilantro but not Coriander Seeds?
Coriander is the seed of the cilantro plant. While some people react more strongly to the fresh leaves, the proteins are similar. Most allergists recommend avoiding both to prevent a reaction.
Does Cooking Cilantro make it safe?
For some with mild Oral Allergy Syndrome, heat may break down the proteins enough to reduce a reaction. However, for those with a true food allergy, the allergens may remain stable even after cooking.
Where is Cilantro commonly “hidden”?
Cilantro is a frequent ingredient in spice blends, curry powders, salsas, guacamole, and marinades. Always inform restaurant staff of your allergy, as it is often used as a hidden flavor enhancer.
Can You Outgrow a Cilantro Allergy?
While some childhood allergies are outgrown, spice and herb allergies that appear in adulthood tend to be lifelong.