I also remember reading that if you're having this type of symptoms during Induction that you can go ahead and add a few low-carb nuts (like almonds, hazelnuts, brazil nuts, macadamias, sunflower seeds) to your diet. I had to add a few sunflower seeds from time to time and it really helped me a lot. The book also says to make sure you are getting enough salt, as the rapid weight loss not only removes vital minerals like potassium, but salt as well.