That all sounds like an abrupt and rocky transition from predominately sugar-burning to fat-burning. It takes a few days or weeks to get the fat-burning enzymes fully on board, and in the meantime, there is no energy unless it comes from carbs. Could she stand going from .5 to .8 of carbs just during transition? Even JK says adding just 10-15 grams can alleviate the shakes etc.

i honestly think it's a bad idea to do things that make you feel bad. That's why I disrespect giving oneself the induction flu. That's like the Stalinist central control model of healing the body - the body protests, but your central brain ignores the peasantry? Sorry if this is muddled - I'm sort of thinking out loud.