The nearest major airport is Indianapolis International Airport (IND / KIND). This airport has international and domestic flights from Indianapolis, Indiana and is 71 miles from the center of Purdue University.
Here is the official FDA definition of natural flavoring: Natural flavor is the essential oil, oleoresin, essence or extractive, protein hydrolysate, distillate, or any product of roasting, heating or enzymolysis, which contains the flavoring constituents derived from a spice, fruit or fruit juice, vegetable or vegetable juice, edible yeast, herb, bark, bud, root, leaf or similar plant material, meat, seafood, poultry, eggs, dairy products, or fermentation products thereof, whose ...
Food labels that display Natural Flavor, Natural Flavors or natural flavoring in any combination refers to the bottom explanation by the FDA. (This may be different in other countries.) According to the US Code of Federal Regulations, a natural flavor or flavoring is: