Very briefly: I hit this by accident. Some time ago there was an exchange of comments about whether VLC eating might function as a management for Glycogen Storage Disease type I, von Gierke's disease. I think the question was firmly, and possibly incorrectly, settled by mnature pointing out that raw cornstarch was THE answer. No choice. I realise GSD type III is not GSD type I, but many of the clinical signs are the same, especially hypoglycaemia. There is choice in type III.
The group have tried a high protein diet to provide hepatic glucose from gluconeogenesis, a mildly ketogeneic diet to AVOID providing exogenous glucose because it just drops in to a bottomless pit of stored glycogen and some synthetic ketones à la Veech to provide some glucose-independent ATP.
Just a case report, it worked. So far so good. Interesting.
PS The new blogger format. I hate it. Can you make the links live in preview????