Asking passengers to avoid eating nuts on flights may not prevent allergic reactions, but wiping down seats with a wet wipe could, according to allergy specialists reviewing recent findings. Small traces of food can often remain on seats, tray tables, and screens, potentially transferring to passengers’ hands and faces. However, evidence suggests that nut allergens are not spread through a plane’s ventilation system.

The UK Civil Aviation Authority requested an expert review on food allergy risks during flights. It found no evidence of nut particles circulating through cabin air, easing concerns that allergens could travel across the cabin. Unlike other environments, aircraft use efficient air filtering and circulation systems, replacing air every three to four minutes, far more frequently than in most buildings.

Instead, specialists suggest that the main risk for allergy sufferers comes from residual food particles left by previous passengers. Allowing passengers with food allergies to board early and wipe down their seating area with antibacterial wipes could reduce the risk of accidental exposure. Studies show low airborne levels of peanut particles close to the source, but physical residue on surfaces poses a more significant threat.

Charities like Allergy UK advocate for safe and inclusive air travel, encouraging airlines to make clear their food allergy policies and consider carrying emergency adrenaline supplies. Allergy experts recommend all individuals at risk carry two adrenaline pens and advise airlines to provide allergy-friendly information to ease passenger concerns.