Now you can set your weight loss goals based on how many pounds you want to lose and in what time-frame. The maximum sustainable healthy Ketozin weight loss level is about 2 pounds per week. In order to lose 2 pounds per week, you need to decrease your energy intake, and/or increase your energy output, by 1000 calories per day. A 500 calorie per day reduction will result in a loss of approximately one pound per week.