Same with coconut oil, which has antibacterial properties that could help reduce dark spots and tighten skin.

Building on previous work, researchers in ACS Infectious Diseases have demonstrated a potential antibacterial treatment from a modified darobactin, a compound originally from a bacterium.

"If food-allergic people can board first, and have time to clean their seat area with something like a baby wipe or antibacterial wipe, they are much less likely to have accidental reactions," Prof Turner said.

All four plants showed antibacterial activity against at least one multidrug-resistant strain of the bug, E. coli.

Previous studies have shown that wood has antibacterial and antifungal properties, making it an ideal material for cutting boards.