The PB is low-carb rather than very low carb (i.e. ketogenic) but ketogenic diets have been, and still are, used for epilepsy. Information in here, for example;
Amazon.com: The Art and Science of Low Carbohydrate Living: An Expert Guide to Making the Life-Saving Benefits of Carbohydrate Restriction Sustainable and Enjoyable (9780983490708): Stephen D. Phinney, Jeff S. Volek: Books
AFAICT, some time on such a diet can "reset" things so that a ketogenic diet doesn't have to be permanent.
epilepsy ketogenic - PMC - NCBI
As regards type 1 diabetes, someone in your part of the world has made some interesting connections between the proteins in some types of milk and the incidence of Type 1 diabetes. It's Keith Woodford I mean:
http://keithwoodford.files.wordpress...011-final1.pdfEvidence linking A1 beta casein to Type 1 (insulin-dependent) diabetes includes major differences in incidence between individual countries within the developed world (i.e. countries with similar lifestyles). These differences correlate remarkably with A1 beta-casein intake of these populations (10). Alternative hypotheses are unable to explain this. Supportive evidence comes from animal trials, evidence linking IDDM to milk exposure in general (11-13) and A1 beta-casein in particular (14, 15). The increasing incidence of Type 1 diabetes over time is likely to be a function of issues affecting gut permeability or antigenic susceptibility (viruses, antibiotics, hygiene factor, Vitamin D etc) rather than the quantity of A1 beta-casein per se.
If that really is the source of the damage, then I guess it's done already, but still I'd have thought you'd probably want to get dairy out the child's diet -- or A1 dairy, at any rate, since you can get A2 dairy Down Under easily enough.
As I understand it a lower-carbohydrate diet could be beneficial to a Type 1 -- because they'd need less insulin given to them, and high levels of insulin likely don't benefit any of us. However, it's not something you'd want to go into without a cooperative doctor: the quantity of insulin taken needs to be balanced with the need for it, as determined by the diet, or there could be nasty consequences. Work with the doctor.