Hi! I did optifast in 1988 when it was 400 calories and kept off my weight until recently. It was due to a thyroid issue. I decided to lose the 20 pounds by redoing optifast800. In my first week I lost 5.5 lbs. I am wondering what the average weight loss is per week for non cheaters. I lost 4 pounds weekly on the 400 but no one can even give me a hint how the 800 is. Can anyone help? All I'm told is 1% of weight per weel. Well 1 pound is not an option for me to continue .so can anyone give me an insight?