An evidence-based educational tool to help you understand potential allergy risks and cross-reactivities associated with nuts, seeds, and dried fruits based on your known allergies.
⚠️ CRITICAL MEDICAL DISCLAIMER
This tool is for informational and educational purposes ONLY and is NOT a substitute for professional medical advice, diagnosis, or treatment. Do not use this tool to self-diagnose food allergies. If you suspect you have a food allergy, you MUST consult with a board-certified allergist or qualified healthcare professional for proper testing and diagnosis. If you experience symptoms of anaphylaxis (difficulty breathing, throat tightness, rapid pulse), call emergency services immediately. Always follow the guidance of your doctor.
Understanding Food Allergies & Cross-Reactivity
A board-certified allergist would explain that food allergies occur when your immune system mistakenly identifies certain proteins as harmful. This tool helps you understand potential cross-reactivity patterns—where proteins in one food are similar enough to proteins in another food that your immune system may react to both. Understanding these patterns, along with nutritional profiles and proper portions, helps you make safer food choices while working with your healthcare team.
Assess Your Allergy Risk
Understanding Risk Levels & Allergy Types
How to Interpret Your Risk Level
This tool provides risk levels based on known scientific data about allergies and cross-reactivity:
- HIGH RISK: Indicates a direct, known allergy or very strong cross-reaction. The food should be strictly avoided under medical supervision.
- MODERATE RISK: Indicates potential for cross-reaction, such as Oral Allergy Syndrome. Caution is advised—discuss with your allergist.
- LOW RISK: Indicates no direct or common cross-reactions based on selected allergies. However, this is not a guarantee of safety.
Understanding Different Allergy Types
Peanut vs. Tree Nut Allergy: Peanuts are legumes (like beans), not tree nuts. However, they’re a top allergen, and many people with peanut allergies are also allergic to tree nuts (almonds, walnuts, cashews). They’re often processed on the same equipment, creating cross-contact risk.
Oral Allergy Syndrome (OAS): Also called pollen-food syndrome, OAS occurs in people with pollen allergies (birch, ragweed). Their immune system mistakes proteins in certain raw fruits, vegetables, and nuts for pollen, causing itchy mouth, throat, or lips. Cooking often destroys these proteins.
Latex-Fruit Syndrome: Cross-reaction in individuals with latex allergy. Certain proteins in latex are similar to proteins in fruits like bananas, figs, kiwis, and avocados, which can trigger reactions.
Sulfite Sensitivity: Not a true IgE-mediated allergy but a chemical sensitivity. In sensitive individuals, sulfites (preservatives used in dried fruits like apricots) can trigger asthma-like symptoms.
Frequently Asked Questions
What is cross-reactivity?
Cross-reactivity happens when proteins in one substance (like walnuts) are similar to proteins in another (like pecans). If you’re allergic to one, your immune system may also react to the other. Understanding protein composition can help identify potential risks.
If I have a birch pollen allergy, what foods should I be cautious with?
Birch pollen allergy is linked to OAS reactions with many foods, including apples, cherries, apricots, almonds, hazelnuts, and peanuts. You should discuss testing and management with your allergist.
Why are cashews and pistachios often linked?
Cashews and pistachios belong to the same botanical family (Anacardiaceae). Their allergenic proteins are very similar, meaning a high percentage of individuals allergic to one will also be allergic to the other.
What should I do if I think I’m having a mild allergic reaction?
Even if symptoms seem mild, stop eating the food immediately and contact your doctor or allergist for guidance. Mild symptoms can sometimes escalate into severe reactions. Always have an emergency action plan if you have known food allergies.
Can I develop food allergies as an adult?
Yes. While many food allergies begin in childhood, adult-onset food allergies are increasingly common, particularly with shellfish, tree nuts, and peanuts. If you experience new symptoms after eating certain foods, consult an allergist.
Are dried fruits generally safe for people with nut allergies?
Dried fruits themselves don’t contain nuts, but they’re often processed in facilities that also process nuts, creating cross-contamination risk. Always check labels for allergen warnings and consider safe portion sizes when trying new foods.