The two patients with most serious side-effects experienced dehydration and hyponatremia. This supports my view that it's important to maintain electrolyte bala

The two patients with most serious side-effects experienced dehydration and hyponatremia. This supports my view that it's important to maintain electrolyte balance during fasting (or other types of dieting like low-carb). When doing these kinds of practices I usually add some salt to water (or other electrolyte solutions if needed although there might be some sugar in them). I think this should help with the common complaints they saw like headache, fatigue, even the cardiovascular related issues. I gotta admit that as far as 'insomnia' goes I don't think electrolytes will help with that... you probably need some combination of fat/protein/carbs to get good sleep.