Yep, I've had a couple of headaches during the pre-op diet and some friends who have also had the surgery told me it was normal. I guess it's sugar/carb/caffeine withdrawal? I upped my water and that helped a little. Hope you feel better!
Thank you! It really hasn't been that bad, I just always get hungry in the afternoon. I'm allowed unlimited non-starchy veggies so cucumbers with a little vinegar and salt have been a lifesaver. Good luck on your liver diet, you can do it!