It varies, some people one day others up to a week. Your body has to get rid of the garbage it has in order for ketosis to be achevied. You also must ensure that you are not getting hidden carbs. If you as not changing the color on the ketostix by day 4 I recommend posting what you eat and getting some advise. Have you read the book yet? I find referring back to it is helpful. The only way to get past day 4 is to make up your mind to get past day 4. I know how you feel, the withdrawal is brutal. When you feel stressed, just focus on one activity, walk, read etc...but stay out of the kitchen...lol. hope that helps. You can do it!