Hi , i am on 810, wk 1 - 7.3lbs, wk2 -3lbs& wk3 - 3lbs, so 13.5lbs in 3 weeks , i think it depends from person to person i like the fact i can have alittle meal with the family and the fact i can still exercise , i don't think i would on ss for feeling dizzy ! Good luck c