The pale referred to in the idiom is usually taken to mean the English Pale, the part of Ireland under English rule, and therefore, as perceived by its rulers, within the bounds of civilization. pale see: beyond the pale
For the food, see Salmon as food. The chum salmon (Oncorhynchus keta) is a species of anadromous fish in the salmon family. It is a Pacific salmon, and may also be known as dog salmon or keta salmon, and is often marketed under the name silverbrite salmon.
The Ketogenic Diet. All cells, including cancer cells, are fueled by glucose. But if you deprive them of glucose, they switch to the alternate fuel, ketone bodies. Except cancer cells. A defect prevents them from making the switch to using ketone bodies as fuel and therefore, cancer cells can only survive on glucose.