For kids and adults with food allergies, a restaurant outing can be a fraught experience. Even when care is taken, freshly prepared or packaged meals can accidentally become cross-contaminated with an offending food and trigger a reaction. Now researchers report in the journal ACS Nano the development of a new portable allergen-detection system—including a keychain analyzer—that could help prevent trips to the emergency room.


Keychain detector could catch food allergens before it’s too late

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