⚠️Food Allergy Cross-Contamination Checker

Select your allergens and cooking environment to assess cross-contamination risk and get targeted prevention tips

What is food allergy cross-contamination?

Cross-contamination occurs when allergen proteins from one food transfer to another through shared cutting boards, utensils, cooking surfaces, or oil. Even microscopic amounts of peanut, tree nut, or shellfish protein can trigger anaphylaxis in highly sensitive individuals. This makes kitchen hygiene critical for anyone cooking for someone with food allergies.

At restaurants, shared fryers are one of the most common sources — fries cooked in the same oil as shellfish can contain shellfish proteins. Always ask restaurants about their allergen protocols before ordering.

Frequently Asked Questions

Is "may contain traces" on packaging dangerous?

"May contain" labels indicate a risk of cross-contamination during manufacturing. For mild allergies, this may be acceptable. For severe allergies or anaphylaxis history, avoid products with these warnings.

What's the safest way to cook for guests with allergies?

Prepare allergen-free dishes first, using dedicated utensils and surfaces. Clean all surfaces and utensils with hot soapy water before starting. Label all dishes clearly and inform guests of every ingredient.