Ending your last meal (before starting at EF) with proteins and healthy fats will help with hunger and blood sugars. I also eliminate sugars and processed carbs a couple days before one as well. Anything besides water, black coffee/tea isn’t really fasting. Taking electrolytes is super helpful in keeping headaches, fatigue, muscle cramps and light headedness away. I like these as they also have b vitamins which are important for the refeed. I use these and it also comes in a sleep version on Amazon too. https://www.amazon.com/Extended-Electrolytes-Himalayan-B-Complex-Vitamins/dp/B08ZYWC5Q8/ref=sr_1_4?keywords=Reset&qid=1672781966&sr=8-4