Food colourings thumb|upright|Nacho cheese Doritos, like many popular snack foods, contain Yellow 6, Yellow 5 and Red 40 synthetic food colour. thumb|upright|Wrapped slices of American cheese are now often coloured with annatto, a natural food colour made from the seeds of the achiote tree.
Food colourings thumb|upright|Nacho cheese Doritos, like many popular snack foods, contain Yellow 6, Yellow 5 and Red 40 synthetic food colour. thumb|upright|Wrapped slices of American cheese are now often coloured with annatto, a natural food colour made from the seeds of the achiote tree.