Purpose of Fructose in Glycogenosis disease

Quote from article: http://www.freepatentsonline.com/4024250.html

Fructose is used to alleviate physiologically-induced stress in the human body. Rationale that comes to from me dad is that fructose stress the liver to break down the glycogen to glucose. In cases like glycogen storage disease, we take von Gierke’s disease (type I) for example, since it's a glucose-6-phosphatase defecient thingy, it can't break down glycogen, which explains it's inability to produce glucose upon the stress from fructose administration.

Cool critical clinical thinking?