You see this a lot on adverts these days, but it got me thinking. What does it mean? Where is the line drawn? When is something "natural" when talking of food products?
Making food - mixing ingredients, cooking them, etc, is all about basic chemistry, so you cannot really rule out the products of basic chemistry from "all natural ingredients" can you. The making of those ingredients is just part of the process of making the food/drink and itself uses "natural ingredients". Indeed, some foods and drinks use a biological process in production (e.g. yeast or bacteria). Things like bread, cheese, and beer spring to mind, so you cannot really rule out things made in that way.
That means things like MSG which can (AFAIK) be made by basic chemistry from wheat, or using a bacterial process, must be "all natural ingredients" too, surely.
At the end of the day, what exactly is not made from things which occur naturally?
How do people responsible for checking the accuracy of adverts decide?