Just to clarify on the background a little bit on maybe why this diet worked for her..
MS interrupts the normal connections of the neurons in the brain so normal movement becomes impossible... and it gets worse as time continues..
These connectors are made out of fat, so it stands to reason by giving your body more building blocks (fat) it can do its job and rebuild the connectors properly.
Sorry for speaking in lay terms.. its been a long time since Ive discussed MS and Ive forgotten the correct terminology