canada is often a topic on NPR radio when GMO foods are being discussed. like other european countries, canada has a definition of what "natural" means that is different than our legal definition here in the US.

in the united states (wiki quote) " The term is often assumed to imply foods that are minimally processed and all of whose ingredients are natural products (in the chemist's sense of that term), but the lack of standards in most jurisdictions means that the term assures nothing. In some countries, the term “natural” is defined and enforced. In others, such as the United States, it has no meaning."

Canada
The Canadian Food Inspection Agency restricts the use of "natural" to foods that have not been significantly altered by processing and gives examples of processes that do or do not significantly alter food. This includes two specific additional requirements:[9]

A natural food or ingredient of a food is not expected to contain, or to ever have contained, an added vitamin, mineral nutrient, artificial flavouring agent or food additive.
A natural food or ingredient of a food does not have any constituent or fraction thereof removed or significantly changed, except the removal of water.